/*! jQuery UI - v1.13.2 - 2022-08-10
* http://jqueryui.com
* Includes: widget.js, position.js, data.js, jquery-patch.js, keycode.js, scroll-parent.js, widgets/draggable.js, widgets/datepicker.js, widgets/mouse.js, widgets/slider.js
* Copyright jQuery Foundation and other contributors; Licensed MIT */

( function( factory ) {
  "use strict";

  if ( typeof define === "function" && define.amd ) {

    // AMD. Register as an anonymous module.
    define( [ "jquery" ], factory );
  } else {

    // Browser globals
    factory( jQuery );
  }
} )( function( $ ) {
  "use strict";

  $.ui = $.ui || {};

  var version = $.ui.version = "1.13.2";


  /*!
 * jQuery UI Widget 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Widget
//>>group: Core
//>>description: Provides a factory for creating stateful widgets with a common API.
//>>docs: http://api.jqueryui.com/jQuery.widget/
//>>demos: http://jqueryui.com/widget/


  var widgetUuid = 0;
  var widgetHasOwnProperty = Array.prototype.hasOwnProperty;
  var widgetSlice = Array.prototype.slice;

  $.cleanData = ( function( orig ) {
    return function( elems ) {
      var events, elem, i;
      for ( i = 0; ( elem = elems[ i ] ) != null; i++ ) {

        // Only trigger remove when necessary to save time
        events = $._data( elem, "events" );
        if ( events && events.remove ) {
          $( elem ).triggerHandler( "remove" );
        }
      }
      orig( elems );
    };
  } )( $.cleanData );

  $.widget = function( name, base, prototype ) {
    var existingConstructor, constructor, basePrototype;

    // ProxiedPrototype allows the provided prototype to remain unmodified
    // so that it can be used as a mixin for multiple widgets (#8876)
    var proxiedPrototype = {};

    var namespace = name.split( "." )[ 0 ];
    name = name.split( "." )[ 1 ];
    var fullName = namespace + "-" + name;

    if ( !prototype ) {
      prototype = base;
      base = $.Widget;
    }

    if ( Array.isArray( prototype ) ) {
      prototype = $.extend.apply( null, [ {} ].concat( prototype ) );
    }

    // Create selector for plugin
    $.expr.pseudos[ fullName.toLowerCase() ] = function( elem ) {
      return !!$.data( elem, fullName );
    };

    $[ namespace ] = $[ namespace ] || {};
    existingConstructor = $[ namespace ][ name ];
    constructor = $[ namespace ][ name ] = function( options, element ) {

      // Allow instantiation without "new" keyword
      if ( !this || !this._createWidget ) {
        return new constructor( options, element );
      }

      // Allow instantiation without initializing for simple inheritance
      // must use "new" keyword (the code above always passes args)
      if ( arguments.length ) {
        this._createWidget( options, element );
      }
    };

    // Extend with the existing constructor to carry over any static properties
    $.extend( constructor, existingConstructor, {
      version: prototype.version,

      // Copy the object used to create the prototype in case we need to
      // redefine the widget later
      _proto: $.extend( {}, prototype ),

      // Track widgets that inherit from this widget in case this widget is
      // redefined after a widget inherits from it
      _childConstructors: []
    } );

    basePrototype = new base();

    // We need to make the options hash a property directly on the new instance
    // otherwise we'll modify the options hash on the prototype that we're
    // inheriting from
    basePrototype.options = $.widget.extend( {}, basePrototype.options );
    $.each( prototype, function( prop, value ) {
      if ( typeof value !== "function" ) {
        proxiedPrototype[ prop ] = value;
        return;
      }
      proxiedPrototype[ prop ] = ( function() {
        function _super() {
          return base.prototype[ prop ].apply( this, arguments );
        }

        function _superApply( args ) {
          return base.prototype[ prop ].apply( this, args );
        }

        return function() {
          var __super = this._super;
          var __superApply = this._superApply;
          var returnValue;

          this._super = _super;
          this._superApply = _superApply;

          returnValue = value.apply( this, arguments );

          this._super = __super;
          this._superApply = __superApply;

          return returnValue;
        };
      } )();
    } );
    constructor.prototype = $.widget.extend( basePrototype, {

      // TODO: remove support for widgetEventPrefix
      // always use the name + a colon as the prefix, e.g., draggable:start
      // don't prefix for widgets that aren't DOM-based
      widgetEventPrefix: existingConstructor ? ( basePrototype.widgetEventPrefix || name ) : name
    }, proxiedPrototype, {
      constructor: constructor,
      namespace: namespace,
      widgetName: name,
      widgetFullName: fullName
    } );

    // If this widget is being redefined then we need to find all widgets that
    // are inheriting from it and redefine all of them so that they inherit from
    // the new version of this widget. We're essentially trying to replace one
    // level in the prototype chain.
    if ( existingConstructor ) {
      $.each( existingConstructor._childConstructors, function( i, child ) {
        var childPrototype = child.prototype;

        // Redefine the child widget using the same prototype that was
        // originally used, but inherit from the new version of the base
        $.widget( childPrototype.namespace + "." + childPrototype.widgetName, constructor,
          child._proto );
      } );

      // Remove the list of existing child constructors from the old constructor
      // so the old child constructors can be garbage collected
      delete existingConstructor._childConstructors;
    } else {
      base._childConstructors.push( constructor );
    }

    $.widget.bridge( name, constructor );

    return constructor;
  };

  $.widget.extend = function( target ) {
    var input = widgetSlice.call( arguments, 1 );
    var inputIndex = 0;
    var inputLength = input.length;
    var key;
    var value;

    for ( ; inputIndex < inputLength; inputIndex++ ) {
      for ( key in input[ inputIndex ] ) {
        value = input[ inputIndex ][ key ];
        if ( widgetHasOwnProperty.call( input[ inputIndex ], key ) && value !== undefined ) {

          // Clone objects
          if ( $.isPlainObject( value ) ) {
            target[ key ] = $.isPlainObject( target[ key ] ) ?
              $.widget.extend( {}, target[ key ], value ) :

              // Don't extend strings, arrays, etc. with objects
              $.widget.extend( {}, value );

            // Copy everything else by reference
          } else {
            target[ key ] = value;
          }
        }
      }
    }
    return target;
  };

  $.widget.bridge = function( name, object ) {
    var fullName = object.prototype.widgetFullName || name;
    $.fn[ name ] = function( options ) {
      var isMethodCall = typeof options === "string";
      var args = widgetSlice.call( arguments, 1 );
      var returnValue = this;

      if ( isMethodCall ) {

        // If this is an empty collection, we need to have the instance method
        // return undefined instead of the jQuery instance
        if ( !this.length && options === "instance" ) {
          returnValue = undefined;
        } else {
          this.each( function() {
            var methodValue;
            var instance = $.data( this, fullName );

            if ( options === "instance" ) {
              returnValue = instance;
              return false;
            }

            if ( !instance ) {
              return $.error( "cannot call methods on " + name +
                " prior to initialization; " +
                "attempted to call method '" + options + "'" );
            }

            if ( typeof instance[ options ] !== "function" ||
              options.charAt( 0 ) === "_" ) {
              return $.error( "no such method '" + options + "' for " + name +
                " widget instance" );
            }

            methodValue = instance[ options ].apply( instance, args );

            if ( methodValue !== instance && methodValue !== undefined ) {
              returnValue = methodValue && methodValue.jquery ?
                returnValue.pushStack( methodValue.get() ) :
                methodValue;
              return false;
            }
          } );
        }
      } else {

        // Allow multiple hashes to be passed on init
        if ( args.length ) {
          options = $.widget.extend.apply( null, [ options ].concat( args ) );
        }

        this.each( function() {
          var instance = $.data( this, fullName );
          if ( instance ) {
            instance.option( options || {} );
            if ( instance._init ) {
              instance._init();
            }
          } else {
            $.data( this, fullName, new object( options, this ) );
          }
        } );
      }

      return returnValue;
    };
  };

  $.Widget = function( /* options, element */ ) {};
  $.Widget._childConstructors = [];

  $.Widget.prototype = {
    widgetName: "widget",
    widgetEventPrefix: "",
    defaultElement: "<div>",

    options: {
      classes: {},
      disabled: false,

      // Callbacks
      create: null
    },

    _createWidget: function( options, element ) {
      element = $( element || this.defaultElement || this )[ 0 ];
      this.element = $( element );
      this.uuid = widgetUuid++;
      this.eventNamespace = "." + this.widgetName + this.uuid;

      this.bindings = $();
      this.hoverable = $();
      this.focusable = $();
      this.classesElementLookup = {};

      if ( element !== this ) {
        $.data( element, this.widgetFullName, this );
        this._on( true, this.element, {
          remove: function( event ) {
            if ( event.target === element ) {
              this.destroy();
            }
          }
        } );
        this.document = $( element.style ?

          // Element within the document
          element.ownerDocument :

          // Element is window or document
          element.document || element );
        this.window = $( this.document[ 0 ].defaultView || this.document[ 0 ].parentWindow );
      }

      this.options = $.widget.extend( {},
        this.options,
        this._getCreateOptions(),
        options );

      this._create();

      if ( this.options.disabled ) {
        this._setOptionDisabled( this.options.disabled );
      }

      this._trigger( "create", null, this._getCreateEventData() );
      this._init();
    },

    _getCreateOptions: function() {
      return {};
    },

    _getCreateEventData: $.noop,

    _create: $.noop,

    _init: $.noop,

    destroy: function() {
      var that = this;

      this._destroy();
      $.each( this.classesElementLookup, function( key, value ) {
        that._removeClass( value, key );
      } );

      // We can probably remove the unbind calls in 2.0
      // all event bindings should go through this._on()
      this.element
        .off( this.eventNamespace )
        .removeData( this.widgetFullName );
      this.widget()
        .off( this.eventNamespace )
        .removeAttr( "aria-disabled" );

      // Clean up events and states
      this.bindings.off( this.eventNamespace );
    },

    _destroy: $.noop,

    widget: function() {
      return this.element;
    },

    option: function( key, value ) {
      var options = key;
      var parts;
      var curOption;
      var i;

      if ( arguments.length === 0 ) {

        // Don't return a reference to the internal hash
        return $.widget.extend( {}, this.options );
      }

      if ( typeof key === "string" ) {

        // Handle nested keys, e.g., "foo.bar" => { foo: { bar: ___ } }
        options = {};
        parts = key.split( "." );
        key = parts.shift();
        if ( parts.length ) {
          curOption = options[ key ] = $.widget.extend( {}, this.options[ key ] );
          for ( i = 0; i < parts.length - 1; i++ ) {
            curOption[ parts[ i ] ] = curOption[ parts[ i ] ] || {};
            curOption = curOption[ parts[ i ] ];
          }
          key = parts.pop();
          if ( arguments.length === 1 ) {
            return curOption[ key ] === undefined ? null : curOption[ key ];
          }
          curOption[ key ] = value;
        } else {
          if ( arguments.length === 1 ) {
            return this.options[ key ] === undefined ? null : this.options[ key ];
          }
          options[ key ] = value;
        }
      }

      this._setOptions( options );

      return this;
    },

    _setOptions: function( options ) {
      var key;

      for ( key in options ) {
        this._setOption( key, options[ key ] );
      }

      return this;
    },

    _setOption: function( key, value ) {
      if ( key === "classes" ) {
        this._setOptionClasses( value );
      }

      this.options[ key ] = value;

      if ( key === "disabled" ) {
        this._setOptionDisabled( value );
      }

      return this;
    },

    _setOptionClasses: function( value ) {
      var classKey, elements, currentElements;

      for ( classKey in value ) {
        currentElements = this.classesElementLookup[ classKey ];
        if ( value[ classKey ] === this.options.classes[ classKey ] ||
          !currentElements ||
          !currentElements.length ) {
          continue;
        }

        // We are doing this to create a new jQuery object because the _removeClass() call
        // on the next line is going to destroy the reference to the current elements being
        // tracked. We need to save a copy of this collection so that we can add the new classes
        // below.
        elements = $( currentElements.get() );
        this._removeClass( currentElements, classKey );

        // We don't use _addClass() here, because that uses this.options.classes
        // for generating the string of classes. We want to use the value passed in from
        // _setOption(), this is the new value of the classes option which was passed to
        // _setOption(). We pass this value directly to _classes().
        elements.addClass( this._classes( {
          element: elements,
          keys: classKey,
          classes: value,
          add: true
        } ) );
      }
    },

    _setOptionDisabled: function( value ) {
      this._toggleClass( this.widget(), this.widgetFullName + "-disabled", null, !!value );

      // If the widget is becoming disabled, then nothing is interactive
      if ( value ) {
        this._removeClass( this.hoverable, null, "ui-state-hover" );
        this._removeClass( this.focusable, null, "ui-state-focus" );
      }
    },

    enable: function() {
      return this._setOptions( { disabled: false } );
    },

    disable: function() {
      return this._setOptions( { disabled: true } );
    },

    _classes: function( options ) {
      var full = [];
      var that = this;

      options = $.extend( {
        element: this.element,
        classes: this.options.classes || {}
      }, options );

      function bindRemoveEvent() {
        var nodesToBind = [];

        options.element.each( function( _, element ) {
          var isTracked = $.map( that.classesElementLookup, function( elements ) {
            return elements;
          } )
            .some( function( elements ) {
              return elements.is( element );
            } );

          if ( !isTracked ) {
            nodesToBind.push( element );
          }
        } );

        that._on( $( nodesToBind ), {
          remove: "_untrackClassesElement"
        } );
      }

      function processClassString( classes, checkOption ) {
        var current, i;
        for ( i = 0; i < classes.length; i++ ) {
          current = that.classesElementLookup[ classes[ i ] ] || $();
          if ( options.add ) {
            bindRemoveEvent();
            current = $( $.uniqueSort( current.get().concat( options.element.get() ) ) );
          } else {
            current = $( current.not( options.element ).get() );
          }
          that.classesElementLookup[ classes[ i ] ] = current;
          full.push( classes[ i ] );
          if ( checkOption && options.classes[ classes[ i ] ] ) {
            full.push( options.classes[ classes[ i ] ] );
          }
        }
      }

      if ( options.keys ) {
        processClassString( options.keys.match( /\S+/g ) || [], true );
      }
      if ( options.extra ) {
        processClassString( options.extra.match( /\S+/g ) || [] );
      }

      return full.join( " " );
    },

    _untrackClassesElement: function( event ) {
      var that = this;
      $.each( that.classesElementLookup, function( key, value ) {
        if ( $.inArray( event.target, value ) !== -1 ) {
          that.classesElementLookup[ key ] = $( value.not( event.target ).get() );
        }
      } );

      this._off( $( event.target ) );
    },

    _removeClass: function( element, keys, extra ) {
      return this._toggleClass( element, keys, extra, false );
    },

    _addClass: function( element, keys, extra ) {
      return this._toggleClass( element, keys, extra, true );
    },

    _toggleClass: function( element, keys, extra, add ) {
      add = ( typeof add === "boolean" ) ? add : extra;
      var shift = ( typeof element === "string" || element === null ),
        options = {
          extra: shift ? keys : extra,
          keys: shift ? element : keys,
          element: shift ? this.element : element,
          add: add
        };
      options.element.toggleClass( this._classes( options ), add );
      return this;
    },

    _on: function( suppressDisabledCheck, element, handlers ) {
      var delegateElement;
      var instance = this;

      // No suppressDisabledCheck flag, shuffle arguments
      if ( typeof suppressDisabledCheck !== "boolean" ) {
        handlers = element;
        element = suppressDisabledCheck;
        suppressDisabledCheck = false;
      }

      // No element argument, shuffle and use this.element
      if ( !handlers ) {
        handlers = element;
        element = this.element;
        delegateElement = this.widget();
      } else {
        element = delegateElement = $( element );
        this.bindings = this.bindings.add( element );
      }

      $.each( handlers, function( event, handler ) {
        function handlerProxy() {

          // Allow widgets to customize the disabled handling
          // - disabled as an array instead of boolean
          // - disabled class as method for disabling individual parts
          if ( !suppressDisabledCheck &&
            ( instance.options.disabled === true ||
              $( this ).hasClass( "ui-state-disabled" ) ) ) {
            return;
          }
          return ( typeof handler === "string" ? instance[ handler ] : handler )
            .apply( instance, arguments );
        }

        // Copy the guid so direct unbinding works
        if ( typeof handler !== "string" ) {
          handlerProxy.guid = handler.guid =
            handler.guid || handlerProxy.guid || $.guid++;
        }

        var match = event.match( /^([\w:-]*)\s*(.*)$/ );
        var eventName = match[ 1 ] + instance.eventNamespace;
        var selector = match[ 2 ];

        if ( selector ) {
          delegateElement.on( eventName, selector, handlerProxy );
        } else {
          element.on( eventName, handlerProxy );
        }
      } );
    },

    _off: function( element, eventName ) {
      eventName = ( eventName || "" ).split( " " ).join( this.eventNamespace + " " ) +
        this.eventNamespace;
      element.off( eventName );

      // Clear the stack to avoid memory leaks (#10056)
      this.bindings = $( this.bindings.not( element ).get() );
      this.focusable = $( this.focusable.not( element ).get() );
      this.hoverable = $( this.hoverable.not( element ).get() );
    },

    _delay: function( handler, delay ) {
      function handlerProxy() {
        return ( typeof handler === "string" ? instance[ handler ] : handler )
          .apply( instance, arguments );
      }
      var instance = this;
      return setTimeout( handlerProxy, delay || 0 );
    },

    _hoverable: function( element ) {
      this.hoverable = this.hoverable.add( element );
      this._on( element, {
        mouseenter: function( event ) {
          this._addClass( $( event.currentTarget ), null, "ui-state-hover" );
        },
        mouseleave: function( event ) {
          this._removeClass( $( event.currentTarget ), null, "ui-state-hover" );
        }
      } );
    },

    _focusable: function( element ) {
      this.focusable = this.focusable.add( element );
      this._on( element, {
        focusin: function( event ) {
          this._addClass( $( event.currentTarget ), null, "ui-state-focus" );
        },
        focusout: function( event ) {
          this._removeClass( $( event.currentTarget ), null, "ui-state-focus" );
        }
      } );
    },

    _trigger: function( type, event, data ) {
      var prop, orig;
      var callback = this.options[ type ];

      data = data || {};
      event = $.Event( event );
      event.type = ( type === this.widgetEventPrefix ?
        type :
        this.widgetEventPrefix + type ).toLowerCase();

      // The original event may come from any element
      // so we need to reset the target on the new event
      event.target = this.element[ 0 ];

      // Copy original event properties over to the new event
      orig = event.originalEvent;
      if ( orig ) {
        for ( prop in orig ) {
          if ( !( prop in event ) ) {
            event[ prop ] = orig[ prop ];
          }
        }
      }

      this.element.trigger( event, data );
      return !( typeof callback === "function" &&
        callback.apply( this.element[ 0 ], [ event ].concat( data ) ) === false ||
        event.isDefaultPrevented() );
    }
  };

  $.each( { show: "fadeIn", hide: "fadeOut" }, function( method, defaultEffect ) {
    $.Widget.prototype[ "_" + method ] = function( element, options, callback ) {
      if ( typeof options === "string" ) {
        options = { effect: options };
      }

      var hasOptions;
      var effectName = !options ?
        method :
        options === true || typeof options === "number" ?
          defaultEffect :
          options.effect || defaultEffect;

      options = options || {};
      if ( typeof options === "number" ) {
        options = { duration: options };
      } else if ( options === true ) {
        options = {};
      }

      hasOptions = !$.isEmptyObject( options );
      options.complete = callback;

      if ( options.delay ) {
        element.delay( options.delay );
      }

      if ( hasOptions && $.effects && $.effects.effect[ effectName ] ) {
        element[ method ]( options );
      } else if ( effectName !== method && element[ effectName ] ) {
        element[ effectName ]( options.duration, options.easing, callback );
      } else {
        element.queue( function( next ) {
          $( this )[ method ]();
          if ( callback ) {
            callback.call( element[ 0 ] );
          }
          next();
        } );
      }
    };
  } );

  var widget = $.widget;


  /*!
 * jQuery UI Position 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 * http://api.jqueryui.com/position/
 */

//>>label: Position
//>>group: Core
//>>description: Positions elements relative to other elements.
//>>docs: http://api.jqueryui.com/position/
//>>demos: http://jqueryui.com/position/


  ( function() {
    var cachedScrollbarWidth,
      max = Math.max,
      abs = Math.abs,
      rhorizontal = /left|center|right/,
      rvertical = /top|center|bottom/,
      roffset = /[\+\-]\d+(\.[\d]+)?%?/,
      rposition = /^\w+/,
      rpercent = /%$/,
      _position = $.fn.position;

    function getOffsets( offsets, width, height ) {
      return [
        parseFloat( offsets[ 0 ] ) * ( rpercent.test( offsets[ 0 ] ) ? width / 100 : 1 ),
        parseFloat( offsets[ 1 ] ) * ( rpercent.test( offsets[ 1 ] ) ? height / 100 : 1 )
      ];
    }

    function parseCss( element, property ) {
      return parseInt( $.css( element, property ), 10 ) || 0;
    }

    function isWindow( obj ) {
      return obj != null && obj === obj.window;
    }

    function getDimensions( elem ) {
      var raw = elem[ 0 ];
      if ( raw.nodeType === 9 ) {
        return {
          width: elem.width(),
          height: elem.height(),
          offset: { top: 0, left: 0 }
        };
      }
      if ( isWindow( raw ) ) {
        return {
          width: elem.width(),
          height: elem.height(),
          offset: { top: elem.scrollTop(), left: elem.scrollLeft() }
        };
      }
      if ( raw.preventDefault ) {
        return {
          width: 0,
          height: 0,
          offset: { top: raw.pageY, left: raw.pageX }
        };
      }
      return {
        width: elem.outerWidth(),
        height: elem.outerHeight(),
        offset: elem.offset()
      };
    }

    $.position = {
      scrollbarWidth: function() {
        if ( cachedScrollbarWidth !== undefined ) {
          return cachedScrollbarWidth;
        }
        var w1, w2,
          div = $( "<div style=" +
            "'display:block;position:absolute;width:200px;height:200px;overflow:hidden;'>" +
            "<div style='height:300px;width:auto;'></div></div>" ),
          innerDiv = div.children()[ 0 ];

        $( "body" ).append( div );
        w1 = innerDiv.offsetWidth;
        div.css( "overflow", "scroll" );

        w2 = innerDiv.offsetWidth;

        if ( w1 === w2 ) {
          w2 = div[ 0 ].clientWidth;
        }

        div.remove();

        return ( cachedScrollbarWidth = w1 - w2 );
      },
      getScrollInfo: function( within ) {
        var overflowX = within.isWindow || within.isDocument ? "" :
            within.element.css( "overflow-x" ),
          overflowY = within.isWindow || within.isDocument ? "" :
            within.element.css( "overflow-y" ),
          hasOverflowX = overflowX === "scroll" ||
            ( overflowX === "auto" && within.width < within.element[ 0 ].scrollWidth ),
          hasOverflowY = overflowY === "scroll" ||
            ( overflowY === "auto" && within.height < within.element[ 0 ].scrollHeight );
        return {
          width: hasOverflowY ? $.position.scrollbarWidth() : 0,
          height: hasOverflowX ? $.position.scrollbarWidth() : 0
        };
      },
      getWithinInfo: function( element ) {
        var withinElement = $( element || window ),
          isElemWindow = isWindow( withinElement[ 0 ] ),
          isDocument = !!withinElement[ 0 ] && withinElement[ 0 ].nodeType === 9,
          hasOffset = !isElemWindow && !isDocument;
        return {
          element: withinElement,
          isWindow: isElemWindow,
          isDocument: isDocument,
          offset: hasOffset ? $( element ).offset() : { left: 0, top: 0 },
          scrollLeft: withinElement.scrollLeft(),
          scrollTop: withinElement.scrollTop(),
          width: withinElement.outerWidth(),
          height: withinElement.outerHeight()
        };
      }
    };

    $.fn.position = function( options ) {
      if ( !options || !options.of ) {
        return _position.apply( this, arguments );
      }

      // Make a copy, we don't want to modify arguments
      options = $.extend( {}, options );

      var atOffset, targetWidth, targetHeight, targetOffset, basePosition, dimensions,

        // Make sure string options are treated as CSS selectors
        target = typeof options.of === "string" ?
          $( document ).find( options.of ) :
          $( options.of ),

        within = $.position.getWithinInfo( options.within ),
        scrollInfo = $.position.getScrollInfo( within ),
        collision = ( options.collision || "flip" ).split( " " ),
        offsets = {};

      dimensions = getDimensions( target );
      if ( target[ 0 ].preventDefault ) {

        // Force left top to allow flipping
        options.at = "left top";
      }
      targetWidth = dimensions.width;
      targetHeight = dimensions.height;
      targetOffset = dimensions.offset;

      // Clone to reuse original targetOffset later
      basePosition = $.extend( {}, targetOffset );

      // Force my and at to have valid horizontal and vertical positions
      // if a value is missing or invalid, it will be converted to center
      $.each( [ "my", "at" ], function() {
        var pos = ( options[ this ] || "" ).split( " " ),
          horizontalOffset,
          verticalOffset;

        if ( pos.length === 1 ) {
          pos = rhorizontal.test( pos[ 0 ] ) ?
            pos.concat( [ "center" ] ) :
            rvertical.test( pos[ 0 ] ) ?
              [ "center" ].concat( pos ) :
              [ "center", "center" ];
        }
        pos[ 0 ] = rhorizontal.test( pos[ 0 ] ) ? pos[ 0 ] : "center";
        pos[ 1 ] = rvertical.test( pos[ 1 ] ) ? pos[ 1 ] : "center";

        // Calculate offsets
        horizontalOffset = roffset.exec( pos[ 0 ] );
        verticalOffset = roffset.exec( pos[ 1 ] );
        offsets[ this ] = [
          horizontalOffset ? horizontalOffset[ 0 ] : 0,
          verticalOffset ? verticalOffset[ 0 ] : 0
        ];

        // Reduce to just the positions without the offsets
        options[ this ] = [
          rposition.exec( pos[ 0 ] )[ 0 ],
          rposition.exec( pos[ 1 ] )[ 0 ]
        ];
      } );

      // Normalize collision option
      if ( collision.length === 1 ) {
        collision[ 1 ] = collision[ 0 ];
      }

      if ( options.at[ 0 ] === "right" ) {
        basePosition.left += targetWidth;
      } else if ( options.at[ 0 ] === "center" ) {
        basePosition.left += targetWidth / 2;
      }

      if ( options.at[ 1 ] === "bottom" ) {
        basePosition.top += targetHeight;
      } else if ( options.at[ 1 ] === "center" ) {
        basePosition.top += targetHeight / 2;
      }

      atOffset = getOffsets( offsets.at, targetWidth, targetHeight );
      basePosition.left += atOffset[ 0 ];
      basePosition.top += atOffset[ 1 ];

      return this.each( function() {
        var collisionPosition, using,
          elem = $( this ),
          elemWidth = elem.outerWidth(),
          elemHeight = elem.outerHeight(),
          marginLeft = parseCss( this, "marginLeft" ),
          marginTop = parseCss( this, "marginTop" ),
          collisionWidth = elemWidth + marginLeft + parseCss( this, "marginRight" ) +
            scrollInfo.width,
          collisionHeight = elemHeight + marginTop + parseCss( this, "marginBottom" ) +
            scrollInfo.height,
          position = $.extend( {}, basePosition ),
          myOffset = getOffsets( offsets.my, elem.outerWidth(), elem.outerHeight() );

        if ( options.my[ 0 ] === "right" ) {
          position.left -= elemWidth;
        } else if ( options.my[ 0 ] === "center" ) {
          position.left -= elemWidth / 2;
        }

        if ( options.my[ 1 ] === "bottom" ) {
          position.top -= elemHeight;
        } else if ( options.my[ 1 ] === "center" ) {
          position.top -= elemHeight / 2;
        }

        position.left += myOffset[ 0 ];
        position.top += myOffset[ 1 ];

        collisionPosition = {
          marginLeft: marginLeft,
          marginTop: marginTop
        };

        $.each( [ "left", "top" ], function( i, dir ) {
          if ( $.ui.position[ collision[ i ] ] ) {
            $.ui.position[ collision[ i ] ][ dir ]( position, {
              targetWidth: targetWidth,
              targetHeight: targetHeight,
              elemWidth: elemWidth,
              elemHeight: elemHeight,
              collisionPosition: collisionPosition,
              collisionWidth: collisionWidth,
              collisionHeight: collisionHeight,
              offset: [ atOffset[ 0 ] + myOffset[ 0 ], atOffset [ 1 ] + myOffset[ 1 ] ],
              my: options.my,
              at: options.at,
              within: within,
              elem: elem
            } );
          }
        } );

        if ( options.using ) {

          // Adds feedback as second argument to using callback, if present
          using = function( props ) {
            var left = targetOffset.left - position.left,
              right = left + targetWidth - elemWidth,
              top = targetOffset.top - position.top,
              bottom = top + targetHeight - elemHeight,
              feedback = {
                target: {
                  element: target,
                  left: targetOffset.left,
                  top: targetOffset.top,
                  width: targetWidth,
                  height: targetHeight
                },
                element: {
                  element: elem,
                  left: position.left,
                  top: position.top,
                  width: elemWidth,
                  height: elemHeight
                },
                horizontal: right < 0 ? "left" : left > 0 ? "right" : "center",
                vertical: bottom < 0 ? "top" : top > 0 ? "bottom" : "middle"
              };
            if ( targetWidth < elemWidth && abs( left + right ) < targetWidth ) {
              feedback.horizontal = "center";
            }
            if ( targetHeight < elemHeight && abs( top + bottom ) < targetHeight ) {
              feedback.vertical = "middle";
            }
            if ( max( abs( left ), abs( right ) ) > max( abs( top ), abs( bottom ) ) ) {
              feedback.important = "horizontal";
            } else {
              feedback.important = "vertical";
            }
            options.using.call( this, props, feedback );
          };
        }

        elem.offset( $.extend( position, { using: using } ) );
      } );
    };

    $.ui.position = {
      fit: {
        left: function( position, data ) {
          var within = data.within,
            withinOffset = within.isWindow ? within.scrollLeft : within.offset.left,
            outerWidth = within.width,
            collisionPosLeft = position.left - data.collisionPosition.marginLeft,
            overLeft = withinOffset - collisionPosLeft,
            overRight = collisionPosLeft + data.collisionWidth - outerWidth - withinOffset,
            newOverRight;

          // Element is wider than within
          if ( data.collisionWidth > outerWidth ) {

            // Element is initially over the left side of within
            if ( overLeft > 0 && overRight <= 0 ) {
              newOverRight = position.left + overLeft + data.collisionWidth - outerWidth -
                withinOffset;
              position.left += overLeft - newOverRight;

              // Element is initially over right side of within
            } else if ( overRight > 0 && overLeft <= 0 ) {
              position.left = withinOffset;

              // Element is initially over both left and right sides of within
            } else {
              if ( overLeft > overRight ) {
                position.left = withinOffset + outerWidth - data.collisionWidth;
              } else {
                position.left = withinOffset;
              }
            }

            // Too far left -> align with left edge
          } else if ( overLeft > 0 ) {
            position.left += overLeft;

            // Too far right -> align with right edge
          } else if ( overRight > 0 ) {
            position.left -= overRight;

            // Adjust based on position and margin
          } else {
            position.left = max( position.left - collisionPosLeft, position.left );
          }
        },
        top: function( position, data ) {
          var within = data.within,
            withinOffset = within.isWindow ? within.scrollTop : within.offset.top,
            outerHeight = data.within.height,
            collisionPosTop = position.top - data.collisionPosition.marginTop,
            overTop = withinOffset - collisionPosTop,
            overBottom = collisionPosTop + data.collisionHeight - outerHeight - withinOffset,
            newOverBottom;

          // Element is taller than within
          if ( data.collisionHeight > outerHeight ) {

            // Element is initially over the top of within
            if ( overTop > 0 && overBottom <= 0 ) {
              newOverBottom = position.top + overTop + data.collisionHeight - outerHeight -
                withinOffset;
              position.top += overTop - newOverBottom;

              // Element is initially over bottom of within
            } else if ( overBottom > 0 && overTop <= 0 ) {
              position.top = withinOffset;

              // Element is initially over both top and bottom of within
            } else {
              if ( overTop > overBottom ) {
                position.top = withinOffset + outerHeight - data.collisionHeight;
              } else {
                position.top = withinOffset;
              }
            }

            // Too far up -> align with top
          } else if ( overTop > 0 ) {
            position.top += overTop;

            // Too far down -> align with bottom edge
          } else if ( overBottom > 0 ) {
            position.top -= overBottom;

            // Adjust based on position and margin
          } else {
            position.top = max( position.top - collisionPosTop, position.top );
          }
        }
      },
      flip: {
        left: function( position, data ) {
          var within = data.within,
            withinOffset = within.offset.left + within.scrollLeft,
            outerWidth = within.width,
            offsetLeft = within.isWindow ? within.scrollLeft : within.offset.left,
            collisionPosLeft = position.left - data.collisionPosition.marginLeft,
            overLeft = collisionPosLeft - offsetLeft,
            overRight = collisionPosLeft + data.collisionWidth - outerWidth - offsetLeft,
            myOffset = data.my[ 0 ] === "left" ?
              -data.elemWidth :
              data.my[ 0 ] === "right" ?
                data.elemWidth :
                0,
            atOffset = data.at[ 0 ] === "left" ?
              data.targetWidth :
              data.at[ 0 ] === "right" ?
                -data.targetWidth :
                0,
            offset = -2 * data.offset[ 0 ],
            newOverRight,
            newOverLeft;

          if ( overLeft < 0 ) {
            newOverRight = position.left + myOffset + atOffset + offset + data.collisionWidth -
              outerWidth - withinOffset;
            if ( newOverRight < 0 || newOverRight < abs( overLeft ) ) {
              position.left += myOffset + atOffset + offset;
            }
          } else if ( overRight > 0 ) {
            newOverLeft = position.left - data.collisionPosition.marginLeft + myOffset +
              atOffset + offset - offsetLeft;
            if ( newOverLeft > 0 || abs( newOverLeft ) < overRight ) {
              position.left += myOffset + atOffset + offset;
            }
          }
        },
        top: function( position, data ) {
          var within = data.within,
            withinOffset = within.offset.top + within.scrollTop,
            outerHeight = within.height,
            offsetTop = within.isWindow ? within.scrollTop : within.offset.top,
            collisionPosTop = position.top - data.collisionPosition.marginTop,
            overTop = collisionPosTop - offsetTop,
            overBottom = collisionPosTop + data.collisionHeight - outerHeight - offsetTop,
            top = data.my[ 1 ] === "top",
            myOffset = top ?
              -data.elemHeight :
              data.my[ 1 ] === "bottom" ?
                data.elemHeight :
                0,
            atOffset = data.at[ 1 ] === "top" ?
              data.targetHeight :
              data.at[ 1 ] === "bottom" ?
                -data.targetHeight :
                0,
            offset = -2 * data.offset[ 1 ],
            newOverTop,
            newOverBottom;
          if ( overTop < 0 ) {
            newOverBottom = position.top + myOffset + atOffset + offset + data.collisionHeight -
              outerHeight - withinOffset;
            if ( newOverBottom < 0 || newOverBottom < abs( overTop ) ) {
              position.top += myOffset + atOffset + offset;
            }
          } else if ( overBottom > 0 ) {
            newOverTop = position.top - data.collisionPosition.marginTop + myOffset + atOffset +
              offset - offsetTop;
            if ( newOverTop > 0 || abs( newOverTop ) < overBottom ) {
              position.top += myOffset + atOffset + offset;
            }
          }
        }
      },
      flipfit: {
        left: function() {
          $.ui.position.flip.left.apply( this, arguments );
          $.ui.position.fit.left.apply( this, arguments );
        },
        top: function() {
          $.ui.position.flip.top.apply( this, arguments );
          $.ui.position.fit.top.apply( this, arguments );
        }
      }
    };

  } )();

  var position = $.ui.position;


  /*!
 * jQuery UI :data 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: :data Selector
//>>group: Core
//>>description: Selects elements which have data stored under the specified key.
//>>docs: http://api.jqueryui.com/data-selector/


  var data = $.extend( $.expr.pseudos, {
    data: $.expr.createPseudo ?
      $.expr.createPseudo( function( dataName ) {
        return function( elem ) {
          return !!$.data( elem, dataName );
        };
      } ) :

      // Support: jQuery <1.8
      function( elem, i, match ) {
        return !!$.data( elem, match[ 3 ] );
      }
  } );

  /*!
 * jQuery UI Support for jQuery core 1.8.x and newer 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 *
 */

//>>label: jQuery 1.8+ Support
//>>group: Core
//>>description: Support version 1.8.x and newer of jQuery core


// Support: jQuery 1.9.x or older
// $.expr[ ":" ] is deprecated.
  if ( !$.expr.pseudos ) {
    $.expr.pseudos = $.expr[ ":" ];
  }

// Support: jQuery 1.11.x or older
// $.unique has been renamed to $.uniqueSort
  if ( !$.uniqueSort ) {
    $.uniqueSort = $.unique;
  }

// Support: jQuery 2.2.x or older.
// This method has been defined in jQuery 3.0.0.
// Code from https://github.com/jquery/jquery/blob/e539bac79e666bba95bba86d690b4e609dca2286/src/selector/escapeSelector.js
  if ( !$.escapeSelector ) {

    // CSS string/identifier serialization
    // https://drafts.csswg.org/cssom/#common-serializing-idioms
    var rcssescape = /([\0-\x1f\x7f]|^-?\d)|^-$|[^\x80-\uFFFF\w-]/g;

    var fcssescape = function( ch, asCodePoint ) {
      if ( asCodePoint ) {

        // U+0000 NULL becomes U+FFFD REPLACEMENT CHARACTER
        if ( ch === "\0" ) {
          return "\uFFFD";
        }

        // Control characters and (dependent upon position) numbers get escaped as code points
        return ch.slice( 0, -1 ) + "\\" + ch.charCodeAt( ch.length - 1 ).toString( 16 ) + " ";
      }

      // Other potentially-special ASCII characters get backslash-escaped
      return "\\" + ch;
    };

    $.escapeSelector = function( sel ) {
      return ( sel + "" ).replace( rcssescape, fcssescape );
    };
  }

// Support: jQuery 3.4.x or older
// These methods have been defined in jQuery 3.5.0.
  if ( !$.fn.even || !$.fn.odd ) {
    $.fn.extend( {
      even: function() {
        return this.filter( function( i ) {
          return i % 2 === 0;
        } );
      },
      odd: function() {
        return this.filter( function( i ) {
          return i % 2 === 1;
        } );
      }
    } );
  }

  ;
  /*!
 * jQuery UI Keycode 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Keycode
//>>group: Core
//>>description: Provide keycodes as keynames
//>>docs: http://api.jqueryui.com/jQuery.ui.keyCode/


  var keycode = $.ui.keyCode = {
    BACKSPACE: 8,
    COMMA: 188,
    DELETE: 46,
    DOWN: 40,
    END: 35,
    ENTER: 13,
    ESCAPE: 27,
    HOME: 36,
    LEFT: 37,
    PAGE_DOWN: 34,
    PAGE_UP: 33,
    PERIOD: 190,
    RIGHT: 39,
    SPACE: 32,
    TAB: 9,
    UP: 38
  };


  /*!
 * jQuery UI Scroll Parent 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: scrollParent
//>>group: Core
//>>description: Get the closest ancestor element that is scrollable.
//>>docs: http://api.jqueryui.com/scrollParent/


  var scrollParent = $.fn.scrollParent = function( includeHidden ) {
    var position = this.css( "position" ),
      excludeStaticParent = position === "absolute",
      overflowRegex = includeHidden ? /(auto|scroll|hidden)/ : /(auto|scroll)/,
      scrollParent = this.parents().filter( function() {
        var parent = $( this );
        if ( excludeStaticParent && parent.css( "position" ) === "static" ) {
          return false;
        }
        return overflowRegex.test( parent.css( "overflow" ) + parent.css( "overflow-y" ) +
          parent.css( "overflow-x" ) );
      } ).eq( 0 );

    return position === "fixed" || !scrollParent.length ?
      $( this[ 0 ].ownerDocument || document ) :
      scrollParent;
  };



// This file is deprecated
  var ie = $.ui.ie = !!/msie [\w.]+/.exec( navigator.userAgent.toLowerCase() );

  /*!
 * jQuery UI Mouse 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Mouse
//>>group: Widgets
//>>description: Abstracts mouse-based interactions to assist in creating certain widgets.
//>>docs: http://api.jqueryui.com/mouse/


  var mouseHandled = false;
  $( document ).on( "mouseup", function() {
    mouseHandled = false;
  } );

  var widgetsMouse = $.widget( "ui.mouse", {
    version: "1.13.2",
    options: {
      cancel: "input, textarea, button, select, option",
      distance: 1,
      delay: 0
    },
    _mouseInit: function() {
      var that = this;

      this.element
        .on( "mousedown." + this.widgetName, function( event ) {
          return that._mouseDown( event );
        } )
        .on( "click." + this.widgetName, function( event ) {
          if ( true === $.data( event.target, that.widgetName + ".preventClickEvent" ) ) {
            $.removeData( event.target, that.widgetName + ".preventClickEvent" );
            event.stopImmediatePropagation();
            return false;
          }
        } );

      this.started = false;
    },

    // TODO: make sure destroying one instance of mouse doesn't mess with
    // other instances of mouse
    _mouseDestroy: function() {
      this.element.off( "." + this.widgetName );
      if ( this._mouseMoveDelegate ) {
        this.document
          .off( "mousemove." + this.widgetName, this._mouseMoveDelegate )
          .off( "mouseup." + this.widgetName, this._mouseUpDelegate );
      }
    },

    _mouseDown: function( event ) {

      // don't let more than one widget handle mouseStart
      if ( mouseHandled ) {
        return;
      }

      this._mouseMoved = false;

      // We may have missed mouseup (out of window)
      if ( this._mouseStarted ) {
        this._mouseUp( event );
      }

      this._mouseDownEvent = event;

      var that = this,
        btnIsLeft = ( event.which === 1 ),

        // event.target.nodeName works around a bug in IE 8 with
        // disabled inputs (#7620)
        elIsCancel = ( typeof this.options.cancel === "string" && event.target.nodeName ?
          $( event.target ).closest( this.options.cancel ).length : false );
      if ( !btnIsLeft || elIsCancel || !this._mouseCapture( event ) ) {
        return true;
      }

      this.mouseDelayMet = !this.options.delay;
      if ( !this.mouseDelayMet ) {
        this._mouseDelayTimer = setTimeout( function() {
          that.mouseDelayMet = true;
        }, this.options.delay );
      }

      if ( this._mouseDistanceMet( event ) && this._mouseDelayMet( event ) ) {
        this._mouseStarted = ( this._mouseStart( event ) !== false );
        if ( !this._mouseStarted ) {
          event.preventDefault();
          return true;
        }
      }

      // Click event may never have fired (Gecko & Opera)
      if ( true === $.data( event.target, this.widgetName + ".preventClickEvent" ) ) {
        $.removeData( event.target, this.widgetName + ".preventClickEvent" );
      }

      // These delegates are required to keep context
      this._mouseMoveDelegate = function( event ) {
        return that._mouseMove( event );
      };
      this._mouseUpDelegate = function( event ) {
        return that._mouseUp( event );
      };

      this.document
        .on( "mousemove." + this.widgetName, this._mouseMoveDelegate )
        .on( "mouseup." + this.widgetName, this._mouseUpDelegate );

      event.preventDefault();

      mouseHandled = true;
      return true;
    },

    _mouseMove: function( event ) {

      // Only check for mouseups outside the document if you've moved inside the document
      // at least once. This prevents the firing of mouseup in the case of IE<9, which will
      // fire a mousemove event if content is placed under the cursor. See #7778
      // Support: IE <9
      if ( this._mouseMoved ) {

        // IE mouseup check - mouseup happened when mouse was out of window
        if ( $.ui.ie && ( !document.documentMode || document.documentMode < 9 ) &&
          !event.button ) {
          return this._mouseUp( event );

          // Iframe mouseup check - mouseup occurred in another document
        } else if ( !event.which ) {

          // Support: Safari <=8 - 9
          // Safari sets which to 0 if you press any of the following keys
          // during a drag (#14461)
          if ( event.originalEvent.altKey || event.originalEvent.ctrlKey ||
            event.originalEvent.metaKey || event.originalEvent.shiftKey ) {
            this.ignoreMissingWhich = true;
          } else if ( !this.ignoreMissingWhich ) {
            return this._mouseUp( event );
          }
        }
      }

      if ( event.which || event.button ) {
        this._mouseMoved = true;
      }

      if ( this._mouseStarted ) {
        this._mouseDrag( event );
        return event.preventDefault();
      }

      if ( this._mouseDistanceMet( event ) && this._mouseDelayMet( event ) ) {
        this._mouseStarted =
          ( this._mouseStart( this._mouseDownEvent, event ) !== false );
        if ( this._mouseStarted ) {
          this._mouseDrag( event );
        } else {
          this._mouseUp( event );
        }
      }

      return !this._mouseStarted;
    },

    _mouseUp: function( event ) {
      this.document
        .off( "mousemove." + this.widgetName, this._mouseMoveDelegate )
        .off( "mouseup." + this.widgetName, this._mouseUpDelegate );

      if ( this._mouseStarted ) {
        this._mouseStarted = false;

        if ( event.target === this._mouseDownEvent.target ) {
          $.data( event.target, this.widgetName + ".preventClickEvent", true );
        }

        this._mouseStop( event );
      }

      if ( this._mouseDelayTimer ) {
        clearTimeout( this._mouseDelayTimer );
        delete this._mouseDelayTimer;
      }

      this.ignoreMissingWhich = false;
      mouseHandled = false;
      event.preventDefault();
    },

    _mouseDistanceMet: function( event ) {
      return ( Math.max(
          Math.abs( this._mouseDownEvent.pageX - event.pageX ),
          Math.abs( this._mouseDownEvent.pageY - event.pageY )
        ) >= this.options.distance
      );
    },

    _mouseDelayMet: function( /* event */ ) {
      return this.mouseDelayMet;
    },

    // These are placeholder methods, to be overriden by extending plugin
    _mouseStart: function( /* event */ ) {},
    _mouseDrag: function( /* event */ ) {},
    _mouseStop: function( /* event */ ) {},
    _mouseCapture: function( /* event */ ) {
      return true;
    }
  } );



// $.ui.plugin is deprecated. Use $.widget() extensions instead.
  var plugin = $.ui.plugin = {
    add: function( module, option, set ) {
      var i,
        proto = $.ui[ module ].prototype;
      for ( i in set ) {
        proto.plugins[ i ] = proto.plugins[ i ] || [];
        proto.plugins[ i ].push( [ option, set[ i ] ] );
      }
    },
    call: function( instance, name, args, allowDisconnected ) {
      var i,
        set = instance.plugins[ name ];

      if ( !set ) {
        return;
      }

      if ( !allowDisconnected && ( !instance.element[ 0 ].parentNode ||
        instance.element[ 0 ].parentNode.nodeType === 11 ) ) {
        return;
      }

      for ( i = 0; i < set.length; i++ ) {
        if ( instance.options[ set[ i ][ 0 ] ] ) {
          set[ i ][ 1 ].apply( instance.element, args );
        }
      }
    }
  };



  var safeActiveElement = $.ui.safeActiveElement = function( document ) {
    var activeElement;

    // Support: IE 9 only
    // IE9 throws an "Unspecified error" accessing document.activeElement from an <iframe>
    try {
      activeElement = document.activeElement;
    } catch ( error ) {
      activeElement = document.body;
    }

    // Support: IE 9 - 11 only
    // IE may return null instead of an element
    // Interestingly, this only seems to occur when NOT in an iframe
    if ( !activeElement ) {
      activeElement = document.body;
    }

    // Support: IE 11 only
    // IE11 returns a seemingly empty object in some cases when accessing
    // document.activeElement from an <iframe>
    if ( !activeElement.nodeName ) {
      activeElement = document.body;
    }

    return activeElement;
  };



  var safeBlur = $.ui.safeBlur = function( element ) {

    // Support: IE9 - 10 only
    // If the <body> is blurred, IE will switch windows, see #9420
    if ( element && element.nodeName.toLowerCase() !== "body" ) {
      $( element ).trigger( "blur" );
    }
  };


  /*!
 * jQuery UI Draggable 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Draggable
//>>group: Interactions
//>>description: Enables dragging functionality for any element.
//>>docs: http://api.jqueryui.com/draggable/
//>>demos: http://jqueryui.com/draggable/
//>>css.structure: ../../themes/base/draggable.css


  $.widget( "ui.draggable", $.ui.mouse, {
    version: "1.13.2",
    widgetEventPrefix: "drag",
    options: {
      addClasses: true,
      appendTo: "parent",
      axis: false,
      connectToSortable: false,
      containment: false,
      cursor: "auto",
      cursorAt: false,
      grid: false,
      handle: false,
      helper: "original",
      iframeFix: false,
      opacity: false,
      refreshPositions: false,
      revert: false,
      revertDuration: 500,
      scope: "default",
      scroll: true,
      scrollSensitivity: 20,
      scrollSpeed: 20,
      snap: false,
      snapMode: "both",
      snapTolerance: 20,
      stack: false,
      zIndex: false,

      // Callbacks
      drag: null,
      start: null,
      stop: null
    },
    _create: function() {

      if ( this.options.helper === "original" ) {
        this._setPositionRelative();
      }
      if ( this.options.addClasses ) {
        this._addClass( "ui-draggable" );
      }
      this._setHandleClassName();

      this._mouseInit();
    },

    _setOption: function( key, value ) {
      this._super( key, value );
      if ( key === "handle" ) {
        this._removeHandleClassName();
        this._setHandleClassName();
      }
    },

    _destroy: function() {
      if ( ( this.helper || this.element ).is( ".ui-draggable-dragging" ) ) {
        this.destroyOnClear = true;
        return;
      }
      this._removeHandleClassName();
      this._mouseDestroy();
    },

    _mouseCapture: function( event ) {
      var o = this.options;

      // Among others, prevent a drag on a resizable-handle
      if ( this.helper || o.disabled ||
        $( event.target ).closest( ".ui-resizable-handle" ).length > 0 ) {
        return false;
      }

      //Quit if we're not on a valid handle
      this.handle = this._getHandle( event );
      if ( !this.handle ) {
        return false;
      }

      this._blurActiveElement( event );

      this._blockFrames( o.iframeFix === true ? "iframe" : o.iframeFix );

      return true;

    },

    _blockFrames: function( selector ) {
      this.iframeBlocks = this.document.find( selector ).map( function() {
        var iframe = $( this );

        return $( "<div>" )
          .css( "position", "absolute" )
          .appendTo( iframe.parent() )
          .outerWidth( iframe.outerWidth() )
          .outerHeight( iframe.outerHeight() )
          .offset( iframe.offset() )[ 0 ];
      } );
    },

    _unblockFrames: function() {
      if ( this.iframeBlocks ) {
        this.iframeBlocks.remove();
        delete this.iframeBlocks;
      }
    },

    _blurActiveElement: function( event ) {
      var activeElement = $.ui.safeActiveElement( this.document[ 0 ] ),
        target = $( event.target );

      // Don't blur if the event occurred on an element that is within
      // the currently focused element
      // See #10527, #12472
      if ( target.closest( activeElement ).length ) {
        return;
      }

      // Blur any element that currently has focus, see #4261
      $.ui.safeBlur( activeElement );
    },

    _mouseStart: function( event ) {

      var o = this.options;

      //Create and append the visible helper
      this.helper = this._createHelper( event );

      this._addClass( this.helper, "ui-draggable-dragging" );

      //Cache the helper size
      this._cacheHelperProportions();

      //If ddmanager is used for droppables, set the global draggable
      if ( $.ui.ddmanager ) {
        $.ui.ddmanager.current = this;
      }

      /*
		 * - Position generation -
		 * This block generates everything position related - it's the core of draggables.
		 */

      //Cache the margins of the original element
      this._cacheMargins();

      //Store the helper's css position
      this.cssPosition = this.helper.css( "position" );
      this.scrollParent = this.helper.scrollParent( true );
      this.offsetParent = this.helper.offsetParent();
      this.hasFixedAncestor = this.helper.parents().filter( function() {
        return $( this ).css( "position" ) === "fixed";
      } ).length > 0;

      //The element's absolute position on the page minus margins
      this.positionAbs = this.element.offset();
      this._refreshOffsets( event );

      //Generate the original position
      this.originalPosition = this.position = this._generatePosition( event, false );
      this.originalPageX = event.pageX;
      this.originalPageY = event.pageY;

      //Adjust the mouse offset relative to the helper if "cursorAt" is supplied
      if ( o.cursorAt ) {
        this._adjustOffsetFromHelper( o.cursorAt );
      }

      //Set a containment if given in the options
      this._setContainment();

      //Trigger event + callbacks
      if ( this._trigger( "start", event ) === false ) {
        this._clear();
        return false;
      }

      //Recache the helper size
      this._cacheHelperProportions();

      //Prepare the droppable offsets
      if ( $.ui.ddmanager && !o.dropBehaviour ) {
        $.ui.ddmanager.prepareOffsets( this, event );
      }

      // Execute the drag once - this causes the helper not to be visible before getting its
      // correct position
      this._mouseDrag( event, true );

      // If the ddmanager is used for droppables, inform the manager that dragging has started
      // (see #5003)
      if ( $.ui.ddmanager ) {
        $.ui.ddmanager.dragStart( this, event );
      }

      return true;
    },

    _refreshOffsets: function( event ) {
      this.offset = {
        top: this.positionAbs.top - this.margins.top,
        left: this.positionAbs.left - this.margins.left,
        scroll: false,
        parent: this._getParentOffset(),
        relative: this._getRelativeOffset()
      };

      this.offset.click = {
        left: event.pageX - this.offset.left,
        top: event.pageY - this.offset.top
      };
    },

    _mouseDrag: function( event, noPropagation ) {

      // reset any necessary cached properties (see #5009)
      if ( this.hasFixedAncestor ) {
        this.offset.parent = this._getParentOffset();
      }

      //Compute the helpers position
      this.position = this._generatePosition( event, true );
      this.positionAbs = this._convertPositionTo( "absolute" );

      //Call plugins and callbacks and use the resulting position if something is returned
      if ( !noPropagation ) {
        var ui = this._uiHash();
        if ( this._trigger( "drag", event, ui ) === false ) {
          this._mouseUp( new $.Event( "mouseup", event ) );
          return false;
        }
        this.position = ui.position;
      }

      this.helper[ 0 ].style.left = this.position.left + "px";
      this.helper[ 0 ].style.top = this.position.top + "px";

      if ( $.ui.ddmanager ) {
        $.ui.ddmanager.drag( this, event );
      }

      return false;
    },

    _mouseStop: function( event ) {

      //If we are using droppables, inform the manager about the drop
      var that = this,
        dropped = false;
      if ( $.ui.ddmanager && !this.options.dropBehaviour ) {
        dropped = $.ui.ddmanager.drop( this, event );
      }

      //if a drop comes from outside (a sortable)
      if ( this.dropped ) {
        dropped = this.dropped;
        this.dropped = false;
      }

      if ( ( this.options.revert === "invalid" && !dropped ) ||
        ( this.options.revert === "valid" && dropped ) ||
        this.options.revert === true || ( typeof this.options.revert === "function" &&
          this.options.revert.call( this.element, dropped ) )
      ) {
        $( this.helper ).animate(
          this.originalPosition,
          parseInt( this.options.revertDuration, 10 ),
          function() {
            if ( that._trigger( "stop", event ) !== false ) {
              that._clear();
            }
          }
        );
      } else {
        if ( this._trigger( "stop", event ) !== false ) {
          this._clear();
        }
      }

      return false;
    },

    _mouseUp: function( event ) {
      this._unblockFrames();

      // If the ddmanager is used for droppables, inform the manager that dragging has stopped
      // (see #5003)
      if ( $.ui.ddmanager ) {
        $.ui.ddmanager.dragStop( this, event );
      }

      // Only need to focus if the event occurred on the draggable itself, see #10527
      if ( this.handleElement.is( event.target ) ) {

        // The interaction is over; whether or not the click resulted in a drag,
        // focus the element
        this.element.trigger( "focus" );
      }

      return $.ui.mouse.prototype._mouseUp.call( this, event );
    },

    cancel: function() {

      if ( this.helper.is( ".ui-draggable-dragging" ) ) {
        this._mouseUp( new $.Event( "mouseup", { target: this.element[ 0 ] } ) );
      } else {
        this._clear();
      }

      return this;

    },

    _getHandle: function( event ) {
      return this.options.handle ?
        !!$( event.target ).closest( this.element.find( this.options.handle ) ).length :
        true;
    },

    _setHandleClassName: function() {
      this.handleElement = this.options.handle ?
        this.element.find( this.options.handle ) : this.element;
      this._addClass( this.handleElement, "ui-draggable-handle" );
    },

    _removeHandleClassName: function() {
      this._removeClass( this.handleElement, "ui-draggable-handle" );
    },

    _createHelper: function( event ) {

      var o = this.options,
        helperIsFunction = typeof o.helper === "function",
        helper = helperIsFunction ?
          $( o.helper.apply( this.element[ 0 ], [ event ] ) ) :
          ( o.helper === "clone" ?
            this.element.clone().removeAttr( "id" ) :
            this.element );

      if ( !helper.parents( "body" ).length ) {
        helper.appendTo( ( o.appendTo === "parent" ?
          this.element[ 0 ].parentNode :
          o.appendTo ) );
      }

      // Http://bugs.jqueryui.com/ticket/9446
      // a helper function can return the original element
      // which wouldn't have been set to relative in _create
      if ( helperIsFunction && helper[ 0 ] === this.element[ 0 ] ) {
        this._setPositionRelative();
      }

      if ( helper[ 0 ] !== this.element[ 0 ] &&
        !( /(fixed|absolute)/ ).test( helper.css( "position" ) ) ) {
        helper.css( "position", "absolute" );
      }

      return helper;

    },

    _setPositionRelative: function() {
      if ( !( /^(?:r|a|f)/ ).test( this.element.css( "position" ) ) ) {
        this.element[ 0 ].style.position = "relative";
      }
    },

    _adjustOffsetFromHelper: function( obj ) {
      if ( typeof obj === "string" ) {
        obj = obj.split( " " );
      }
      if ( Array.isArray( obj ) ) {
        obj = { left: +obj[ 0 ], top: +obj[ 1 ] || 0 };
      }
      if ( "left" in obj ) {
        this.offset.click.left = obj.left + this.margins.left;
      }
      if ( "right" in obj ) {
        this.offset.click.left = this.helperProportions.width - obj.right + this.margins.left;
      }
      if ( "top" in obj ) {
        this.offset.click.top = obj.top + this.margins.top;
      }
      if ( "bottom" in obj ) {
        this.offset.click.top = this.helperProportions.height - obj.bottom + this.margins.top;
      }
    },

    _isRootNode: function( element ) {
      return ( /(html|body)/i ).test( element.tagName ) || element === this.document[ 0 ];
    },

    _getParentOffset: function() {

      //Get the offsetParent and cache its position
      var po = this.offsetParent.offset(),
        document = this.document[ 0 ];

      // This is a special case where we need to modify a offset calculated on start, since the
      // following happened:
      // 1. The position of the helper is absolute, so it's position is calculated based on the
      // next positioned parent
      // 2. The actual offset parent is a child of the scroll parent, and the scroll parent isn't
      // the document, which means that the scroll is included in the initial calculation of the
      // offset of the parent, and never recalculated upon drag
      if ( this.cssPosition === "absolute" && this.scrollParent[ 0 ] !== document &&
        $.contains( this.scrollParent[ 0 ], this.offsetParent[ 0 ] ) ) {
        po.left += this.scrollParent.scrollLeft();
        po.top += this.scrollParent.scrollTop();
      }

      if ( this._isRootNode( this.offsetParent[ 0 ] ) ) {
        po = { top: 0, left: 0 };
      }

      return {
        top: po.top + ( parseInt( this.offsetParent.css( "borderTopWidth" ), 10 ) || 0 ),
        left: po.left + ( parseInt( this.offsetParent.css( "borderLeftWidth" ), 10 ) || 0 )
      };

    },

    _getRelativeOffset: function() {
      if ( this.cssPosition !== "relative" ) {
        return { top: 0, left: 0 };
      }

      var p = this.element.position(),
        scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] );

      return {
        top: p.top - ( parseInt( this.helper.css( "top" ), 10 ) || 0 ) +
          ( !scrollIsRootNode ? this.scrollParent.scrollTop() : 0 ),
        left: p.left - ( parseInt( this.helper.css( "left" ), 10 ) || 0 ) +
          ( !scrollIsRootNode ? this.scrollParent.scrollLeft() : 0 )
      };

    },

    _cacheMargins: function() {
      this.margins = {
        left: ( parseInt( this.element.css( "marginLeft" ), 10 ) || 0 ),
        top: ( parseInt( this.element.css( "marginTop" ), 10 ) || 0 ),
        right: ( parseInt( this.element.css( "marginRight" ), 10 ) || 0 ),
        bottom: ( parseInt( this.element.css( "marginBottom" ), 10 ) || 0 )
      };
    },

    _cacheHelperProportions: function() {
      this.helperProportions = {
        width: this.helper.outerWidth(),
        height: this.helper.outerHeight()
      };
    },

    _setContainment: function() {

      var isUserScrollable, c, ce,
        o = this.options,
        document = this.document[ 0 ];

      this.relativeContainer = null;

      if ( !o.containment ) {
        this.containment = null;
        return;
      }

      if ( o.containment === "window" ) {
        this.containment = [
          $( window ).scrollLeft() - this.offset.relative.left - this.offset.parent.left,
          $( window ).scrollTop() - this.offset.relative.top - this.offset.parent.top,
          $( window ).scrollLeft() + $( window ).width() -
          this.helperProportions.width - this.margins.left,
          $( window ).scrollTop() +
          ( $( window ).height() || document.body.parentNode.scrollHeight ) -
          this.helperProportions.height - this.margins.top
        ];
        return;
      }

      if ( o.containment === "document" ) {
        this.containment = [
          0,
          0,
          $( document ).width() - this.helperProportions.width - this.margins.left,
          ( $( document ).height() || document.body.parentNode.scrollHeight ) -
          this.helperProportions.height - this.margins.top
        ];
        return;
      }

      if ( o.containment.constructor === Array ) {
        this.containment = o.containment;
        return;
      }

      if ( o.containment === "parent" ) {
        o.containment = this.helper[ 0 ].parentNode;
      }

      c = $( o.containment );
      ce = c[ 0 ];

      if ( !ce ) {
        return;
      }

      isUserScrollable = /(scroll|auto)/.test( c.css( "overflow" ) );

      this.containment = [
        ( parseInt( c.css( "borderLeftWidth" ), 10 ) || 0 ) +
        ( parseInt( c.css( "paddingLeft" ), 10 ) || 0 ),
        ( parseInt( c.css( "borderTopWidth" ), 10 ) || 0 ) +
        ( parseInt( c.css( "paddingTop" ), 10 ) || 0 ),
        ( isUserScrollable ? Math.max( ce.scrollWidth, ce.offsetWidth ) : ce.offsetWidth ) -
        ( parseInt( c.css( "borderRightWidth" ), 10 ) || 0 ) -
        ( parseInt( c.css( "paddingRight" ), 10 ) || 0 ) -
        this.helperProportions.width -
        this.margins.left -
        this.margins.right,
        ( isUserScrollable ? Math.max( ce.scrollHeight, ce.offsetHeight ) : ce.offsetHeight ) -
        ( parseInt( c.css( "borderBottomWidth" ), 10 ) || 0 ) -
        ( parseInt( c.css( "paddingBottom" ), 10 ) || 0 ) -
        this.helperProportions.height -
        this.margins.top -
        this.margins.bottom
      ];
      this.relativeContainer = c;
    },

    _convertPositionTo: function( d, pos ) {

      if ( !pos ) {
        pos = this.position;
      }

      var mod = d === "absolute" ? 1 : -1,
        scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] );

      return {
        top: (

          // The absolute mouse position
          pos.top	+

          // Only for relative positioned nodes: Relative offset from element to offset parent
          this.offset.relative.top * mod +

          // The offsetParent's offset without borders (offset + border)
          this.offset.parent.top * mod -
          ( ( this.cssPosition === "fixed" ?
            -this.offset.scroll.top :
            ( scrollIsRootNode ? 0 : this.offset.scroll.top ) ) * mod )
        ),
        left: (

          // The absolute mouse position
          pos.left +

          // Only for relative positioned nodes: Relative offset from element to offset parent
          this.offset.relative.left * mod +

          // The offsetParent's offset without borders (offset + border)
          this.offset.parent.left * mod	-
          ( ( this.cssPosition === "fixed" ?
            -this.offset.scroll.left :
            ( scrollIsRootNode ? 0 : this.offset.scroll.left ) ) * mod )
        )
      };

    },

    _generatePosition: function( event, constrainPosition ) {

      var containment, co, top, left,
        o = this.options,
        scrollIsRootNode = this._isRootNode( this.scrollParent[ 0 ] ),
        pageX = event.pageX,
        pageY = event.pageY;

      // Cache the scroll
      if ( !scrollIsRootNode || !this.offset.scroll ) {
        this.offset.scroll = {
          top: this.scrollParent.scrollTop(),
          left: this.scrollParent.scrollLeft()
        };
      }

      /*
		 * - Position constraining -
		 * Constrain the position to a mix of grid, containment.
		 */

      // If we are not dragging yet, we won't check for options
      if ( constrainPosition ) {
        if ( this.containment ) {
          if ( this.relativeContainer ) {
            co = this.relativeContainer.offset();
            containment = [
              this.containment[ 0 ] + co.left,
              this.containment[ 1 ] + co.top,
              this.containment[ 2 ] + co.left,
              this.containment[ 3 ] + co.top
            ];
          } else {
            containment = this.containment;
          }

          if ( event.pageX - this.offset.click.left < containment[ 0 ] ) {
            pageX = containment[ 0 ] + this.offset.click.left;
          }
          if ( event.pageY - this.offset.click.top < containment[ 1 ] ) {
            pageY = containment[ 1 ] + this.offset.click.top;
          }
          if ( event.pageX - this.offset.click.left > containment[ 2 ] ) {
            pageX = containment[ 2 ] + this.offset.click.left;
          }
          if ( event.pageY - this.offset.click.top > containment[ 3 ] ) {
            pageY = containment[ 3 ] + this.offset.click.top;
          }
        }

        if ( o.grid ) {

          //Check for grid elements set to 0 to prevent divide by 0 error causing invalid
          // argument errors in IE (see ticket #6950)
          top = o.grid[ 1 ] ? this.originalPageY + Math.round( ( pageY -
            this.originalPageY ) / o.grid[ 1 ] ) * o.grid[ 1 ] : this.originalPageY;
          pageY = containment ? ( ( top - this.offset.click.top >= containment[ 1 ] ||
            top - this.offset.click.top > containment[ 3 ] ) ?
            top :
            ( ( top - this.offset.click.top >= containment[ 1 ] ) ?
              top - o.grid[ 1 ] : top + o.grid[ 1 ] ) ) : top;

          left = o.grid[ 0 ] ? this.originalPageX +
            Math.round( ( pageX - this.originalPageX ) / o.grid[ 0 ] ) * o.grid[ 0 ] :
            this.originalPageX;
          pageX = containment ? ( ( left - this.offset.click.left >= containment[ 0 ] ||
            left - this.offset.click.left > containment[ 2 ] ) ?
            left :
            ( ( left - this.offset.click.left >= containment[ 0 ] ) ?
              left - o.grid[ 0 ] : left + o.grid[ 0 ] ) ) : left;
        }

        if ( o.axis === "y" ) {
          pageX = this.originalPageX;
        }

        if ( o.axis === "x" ) {
          pageY = this.originalPageY;
        }
      }

      return {
        top: (

          // The absolute mouse position
          pageY -

          // Click offset (relative to the element)
          this.offset.click.top -

          // Only for relative positioned nodes: Relative offset from element to offset parent
          this.offset.relative.top -

          // The offsetParent's offset without borders (offset + border)
          this.offset.parent.top +
          ( this.cssPosition === "fixed" ?
            -this.offset.scroll.top :
            ( scrollIsRootNode ? 0 : this.offset.scroll.top ) )
        ),
        left: (

          // The absolute mouse position
          pageX -

          // Click offset (relative to the element)
          this.offset.click.left -

          // Only for relative positioned nodes: Relative offset from element to offset parent
          this.offset.relative.left -

          // The offsetParent's offset without borders (offset + border)
          this.offset.parent.left +
          ( this.cssPosition === "fixed" ?
            -this.offset.scroll.left :
            ( scrollIsRootNode ? 0 : this.offset.scroll.left ) )
        )
      };

    },

    _clear: function() {
      this._removeClass( this.helper, "ui-draggable-dragging" );
      if ( this.helper[ 0 ] !== this.element[ 0 ] && !this.cancelHelperRemoval ) {
        this.helper.remove();
      }
      this.helper = null;
      this.cancelHelperRemoval = false;
      if ( this.destroyOnClear ) {
        this.destroy();
      }
    },

    // From now on bulk stuff - mainly helpers

    _trigger: function( type, event, ui ) {
      ui = ui || this._uiHash();
      $.ui.plugin.call( this, type, [ event, ui, this ], true );

      // Absolute position and offset (see #6884 ) have to be recalculated after plugins
      if ( /^(drag|start|stop)/.test( type ) ) {
        this.positionAbs = this._convertPositionTo( "absolute" );
        ui.offset = this.positionAbs;
      }
      return $.Widget.prototype._trigger.call( this, type, event, ui );
    },

    plugins: {},

    _uiHash: function() {
      return {
        helper: this.helper,
        position: this.position,
        originalPosition: this.originalPosition,
        offset: this.positionAbs
      };
    }

  } );

  $.ui.plugin.add( "draggable", "connectToSortable", {
    start: function( event, ui, draggable ) {
      var uiSortable = $.extend( {}, ui, {
        item: draggable.element
      } );

      draggable.sortables = [];
      $( draggable.options.connectToSortable ).each( function() {
        var sortable = $( this ).sortable( "instance" );

        if ( sortable && !sortable.options.disabled ) {
          draggable.sortables.push( sortable );

          // RefreshPositions is called at drag start to refresh the containerCache
          // which is used in drag. This ensures it's initialized and synchronized
          // with any changes that might have happened on the page since initialization.
          sortable.refreshPositions();
          sortable._trigger( "activate", event, uiSortable );
        }
      } );
    },
    stop: function( event, ui, draggable ) {
      var uiSortable = $.extend( {}, ui, {
        item: draggable.element
      } );

      draggable.cancelHelperRemoval = false;

      $.each( draggable.sortables, function() {
        var sortable = this;

        if ( sortable.isOver ) {
          sortable.isOver = 0;

          // Allow this sortable to handle removing the helper
          draggable.cancelHelperRemoval = true;
          sortable.cancelHelperRemoval = false;

          // Use _storedCSS To restore properties in the sortable,
          // as this also handles revert (#9675) since the draggable
          // may have modified them in unexpected ways (#8809)
          sortable._storedCSS = {
            position: sortable.placeholder.css( "position" ),
            top: sortable.placeholder.css( "top" ),
            left: sortable.placeholder.css( "left" )
          };

          sortable._mouseStop( event );

          // Once drag has ended, the sortable should return to using
          // its original helper, not the shared helper from draggable
          sortable.options.helper = sortable.options._helper;
        } else {

          // Prevent this Sortable from removing the helper.
          // However, don't set the draggable to remove the helper
          // either as another connected Sortable may yet handle the removal.
          sortable.cancelHelperRemoval = true;

          sortable._trigger( "deactivate", event, uiSortable );
        }
      } );
    },
    drag: function( event, ui, draggable ) {
      $.each( draggable.sortables, function() {
        var innermostIntersecting = false,
          sortable = this;

        // Copy over variables that sortable's _intersectsWith uses
        sortable.positionAbs = draggable.positionAbs;
        sortable.helperProportions = draggable.helperProportions;
        sortable.offset.click = draggable.offset.click;

        if ( sortable._intersectsWith( sortable.containerCache ) ) {
          innermostIntersecting = true;

          $.each( draggable.sortables, function() {

            // Copy over variables that sortable's _intersectsWith uses
            this.positionAbs = draggable.positionAbs;
            this.helperProportions = draggable.helperProportions;
            this.offset.click = draggable.offset.click;

            if ( this !== sortable &&
              this._intersectsWith( this.containerCache ) &&
              $.contains( sortable.element[ 0 ], this.element[ 0 ] ) ) {
              innermostIntersecting = false;
            }

            return innermostIntersecting;
          } );
        }

        if ( innermostIntersecting ) {

          // If it intersects, we use a little isOver variable and set it once,
          // so that the move-in stuff gets fired only once.
          if ( !sortable.isOver ) {
            sortable.isOver = 1;

            // Store draggable's parent in case we need to reappend to it later.
            draggable._parent = ui.helper.parent();

            sortable.currentItem = ui.helper
              .appendTo( sortable.element )
              .data( "ui-sortable-item", true );

            // Store helper option to later restore it
            sortable.options._helper = sortable.options.helper;

            sortable.options.helper = function() {
              return ui.helper[ 0 ];
            };

            // Fire the start events of the sortable with our passed browser event,
            // and our own helper (so it doesn't create a new one)
            event.target = sortable.currentItem[ 0 ];
            sortable._mouseCapture( event, true );
            sortable._mouseStart( event, true, true );

            // Because the browser event is way off the new appended portlet,
            // modify necessary variables to reflect the changes
            sortable.offset.click.top = draggable.offset.click.top;
            sortable.offset.click.left = draggable.offset.click.left;
            sortable.offset.parent.left -= draggable.offset.parent.left -
              sortable.offset.parent.left;
            sortable.offset.parent.top -= draggable.offset.parent.top -
              sortable.offset.parent.top;

            draggable._trigger( "toSortable", event );

            // Inform draggable that the helper is in a valid drop zone,
            // used solely in the revert option to handle "valid/invalid".
            draggable.dropped = sortable.element;

            // Need to refreshPositions of all sortables in the case that
            // adding to one sortable changes the location of the other sortables (#9675)
            $.each( draggable.sortables, function() {
              this.refreshPositions();
            } );

            // Hack so receive/update callbacks work (mostly)
            draggable.currentItem = draggable.element;
            sortable.fromOutside = draggable;
          }

          if ( sortable.currentItem ) {
            sortable._mouseDrag( event );

            // Copy the sortable's position because the draggable's can potentially reflect
            // a relative position, while sortable is always absolute, which the dragged
            // element has now become. (#8809)
            ui.position = sortable.position;
          }
        } else {

          // If it doesn't intersect with the sortable, and it intersected before,
          // we fake the drag stop of the sortable, but make sure it doesn't remove
          // the helper by using cancelHelperRemoval.
          if ( sortable.isOver ) {

            sortable.isOver = 0;
            sortable.cancelHelperRemoval = true;

            // Calling sortable's mouseStop would trigger a revert,
            // so revert must be temporarily false until after mouseStop is called.
            sortable.options._revert = sortable.options.revert;
            sortable.options.revert = false;

            sortable._trigger( "out", event, sortable._uiHash( sortable ) );
            sortable._mouseStop( event, true );

            // Restore sortable behaviors that were modfied
            // when the draggable entered the sortable area (#9481)
            sortable.options.revert = sortable.options._revert;
            sortable.options.helper = sortable.options._helper;

            if ( sortable.placeholder ) {
              sortable.placeholder.remove();
            }

            // Restore and recalculate the draggable's offset considering the sortable
            // may have modified them in unexpected ways. (#8809, #10669)
            ui.helper.appendTo( draggable._parent );
            draggable._refreshOffsets( event );
            ui.position = draggable._generatePosition( event, true );

            draggable._trigger( "fromSortable", event );

            // Inform draggable that the helper is no longer in a valid drop zone
            draggable.dropped = false;

            // Need to refreshPositions of all sortables just in case removing
            // from one sortable changes the location of other sortables (#9675)
            $.each( draggable.sortables, function() {
              this.refreshPositions();
            } );
          }
        }
      } );
    }
  } );

  $.ui.plugin.add( "draggable", "cursor", {
    start: function( event, ui, instance ) {
      var t = $( "body" ),
        o = instance.options;

      if ( t.css( "cursor" ) ) {
        o._cursor = t.css( "cursor" );
      }
      t.css( "cursor", o.cursor );
    },
    stop: function( event, ui, instance ) {
      var o = instance.options;
      if ( o._cursor ) {
        $( "body" ).css( "cursor", o._cursor );
      }
    }
  } );

  $.ui.plugin.add( "draggable", "opacity", {
    start: function( event, ui, instance ) {
      var t = $( ui.helper ),
        o = instance.options;
      if ( t.css( "opacity" ) ) {
        o._opacity = t.css( "opacity" );
      }
      t.css( "opacity", o.opacity );
    },
    stop: function( event, ui, instance ) {
      var o = instance.options;
      if ( o._opacity ) {
        $( ui.helper ).css( "opacity", o._opacity );
      }
    }
  } );

  $.ui.plugin.add( "draggable", "scroll", {
    start: function( event, ui, i ) {
      if ( !i.scrollParentNotHidden ) {
        i.scrollParentNotHidden = i.helper.scrollParent( false );
      }

      if ( i.scrollParentNotHidden[ 0 ] !== i.document[ 0 ] &&
        i.scrollParentNotHidden[ 0 ].tagName !== "HTML" ) {
        i.overflowOffset = i.scrollParentNotHidden.offset();
      }
    },
    drag: function( event, ui, i  ) {

      var o = i.options,
        scrolled = false,
        scrollParent = i.scrollParentNotHidden[ 0 ],
        document = i.document[ 0 ];

      if ( scrollParent !== document && scrollParent.tagName !== "HTML" ) {
        if ( !o.axis || o.axis !== "x" ) {
          if ( ( i.overflowOffset.top + scrollParent.offsetHeight ) - event.pageY <
            o.scrollSensitivity ) {
            scrollParent.scrollTop = scrolled = scrollParent.scrollTop + o.scrollSpeed;
          } else if ( event.pageY - i.overflowOffset.top < o.scrollSensitivity ) {
            scrollParent.scrollTop = scrolled = scrollParent.scrollTop - o.scrollSpeed;
          }
        }

        if ( !o.axis || o.axis !== "y" ) {
          if ( ( i.overflowOffset.left + scrollParent.offsetWidth ) - event.pageX <
            o.scrollSensitivity ) {
            scrollParent.scrollLeft = scrolled = scrollParent.scrollLeft + o.scrollSpeed;
          } else if ( event.pageX - i.overflowOffset.left < o.scrollSensitivity ) {
            scrollParent.scrollLeft = scrolled = scrollParent.scrollLeft - o.scrollSpeed;
          }
        }

      } else {

        if ( !o.axis || o.axis !== "x" ) {
          if ( event.pageY - $( document ).scrollTop() < o.scrollSensitivity ) {
            scrolled = $( document ).scrollTop( $( document ).scrollTop() - o.scrollSpeed );
          } else if ( $( window ).height() - ( event.pageY - $( document ).scrollTop() ) <
            o.scrollSensitivity ) {
            scrolled = $( document ).scrollTop( $( document ).scrollTop() + o.scrollSpeed );
          }
        }

        if ( !o.axis || o.axis !== "y" ) {
          if ( event.pageX - $( document ).scrollLeft() < o.scrollSensitivity ) {
            scrolled = $( document ).scrollLeft(
              $( document ).scrollLeft() - o.scrollSpeed
            );
          } else if ( $( window ).width() - ( event.pageX - $( document ).scrollLeft() ) <
            o.scrollSensitivity ) {
            scrolled = $( document ).scrollLeft(
              $( document ).scrollLeft() + o.scrollSpeed
            );
          }
        }

      }

      if ( scrolled !== false && $.ui.ddmanager && !o.dropBehaviour ) {
        $.ui.ddmanager.prepareOffsets( i, event );
      }

    }
  } );

  $.ui.plugin.add( "draggable", "snap", {
    start: function( event, ui, i ) {

      var o = i.options;

      i.snapElements = [];

      $( o.snap.constructor !== String ? ( o.snap.items || ":data(ui-draggable)" ) : o.snap )
        .each( function() {
          var $t = $( this ),
            $o = $t.offset();
          if ( this !== i.element[ 0 ] ) {
            i.snapElements.push( {
              item: this,
              width: $t.outerWidth(), height: $t.outerHeight(),
              top: $o.top, left: $o.left
            } );
          }
        } );

    },
    drag: function( event, ui, inst ) {

      var ts, bs, ls, rs, l, r, t, b, i, first,
        o = inst.options,
        d = o.snapTolerance,
        x1 = ui.offset.left, x2 = x1 + inst.helperProportions.width,
        y1 = ui.offset.top, y2 = y1 + inst.helperProportions.height;

      for ( i = inst.snapElements.length - 1; i >= 0; i-- ) {

        l = inst.snapElements[ i ].left - inst.margins.left;
        r = l + inst.snapElements[ i ].width;
        t = inst.snapElements[ i ].top - inst.margins.top;
        b = t + inst.snapElements[ i ].height;

        if ( x2 < l - d || x1 > r + d || y2 < t - d || y1 > b + d ||
          !$.contains( inst.snapElements[ i ].item.ownerDocument,
            inst.snapElements[ i ].item ) ) {
          if ( inst.snapElements[ i ].snapping ) {
            if ( inst.options.snap.release ) {
              inst.options.snap.release.call(
                inst.element,
                event,
                $.extend( inst._uiHash(), { snapItem: inst.snapElements[ i ].item } )
              );
            }
          }
          inst.snapElements[ i ].snapping = false;
          continue;
        }

        if ( o.snapMode !== "inner" ) {
          ts = Math.abs( t - y2 ) <= d;
          bs = Math.abs( b - y1 ) <= d;
          ls = Math.abs( l - x2 ) <= d;
          rs = Math.abs( r - x1 ) <= d;
          if ( ts ) {
            ui.position.top = inst._convertPositionTo( "relative", {
              top: t - inst.helperProportions.height,
              left: 0
            } ).top;
          }
          if ( bs ) {
            ui.position.top = inst._convertPositionTo( "relative", {
              top: b,
              left: 0
            } ).top;
          }
          if ( ls ) {
            ui.position.left = inst._convertPositionTo( "relative", {
              top: 0,
              left: l - inst.helperProportions.width
            } ).left;
          }
          if ( rs ) {
            ui.position.left = inst._convertPositionTo( "relative", {
              top: 0,
              left: r
            } ).left;
          }
        }

        first = ( ts || bs || ls || rs );

        if ( o.snapMode !== "outer" ) {
          ts = Math.abs( t - y1 ) <= d;
          bs = Math.abs( b - y2 ) <= d;
          ls = Math.abs( l - x1 ) <= d;
          rs = Math.abs( r - x2 ) <= d;
          if ( ts ) {
            ui.position.top = inst._convertPositionTo( "relative", {
              top: t,
              left: 0
            } ).top;
          }
          if ( bs ) {
            ui.position.top = inst._convertPositionTo( "relative", {
              top: b - inst.helperProportions.height,
              left: 0
            } ).top;
          }
          if ( ls ) {
            ui.position.left = inst._convertPositionTo( "relative", {
              top: 0,
              left: l
            } ).left;
          }
          if ( rs ) {
            ui.position.left = inst._convertPositionTo( "relative", {
              top: 0,
              left: r - inst.helperProportions.width
            } ).left;
          }
        }

        if ( !inst.snapElements[ i ].snapping && ( ts || bs || ls || rs || first ) ) {
          if ( inst.options.snap.snap ) {
            inst.options.snap.snap.call(
              inst.element,
              event,
              $.extend( inst._uiHash(), {
                snapItem: inst.snapElements[ i ].item
              } ) );
          }
        }
        inst.snapElements[ i ].snapping = ( ts || bs || ls || rs || first );

      }

    }
  } );

  $.ui.plugin.add( "draggable", "stack", {
    start: function( event, ui, instance ) {
      var min,
        o = instance.options,
        group = $.makeArray( $( o.stack ) ).sort( function( a, b ) {
          return ( parseInt( $( a ).css( "zIndex" ), 10 ) || 0 ) -
            ( parseInt( $( b ).css( "zIndex" ), 10 ) || 0 );
        } );

      if ( !group.length ) {
        return;
      }

      min = parseInt( $( group[ 0 ] ).css( "zIndex" ), 10 ) || 0;
      $( group ).each( function( i ) {
        $( this ).css( "zIndex", min + i );
      } );
      this.css( "zIndex", ( min + group.length ) );
    }
  } );

  $.ui.plugin.add( "draggable", "zIndex", {
    start: function( event, ui, instance ) {
      var t = $( ui.helper ),
        o = instance.options;

      if ( t.css( "zIndex" ) ) {
        o._zIndex = t.css( "zIndex" );
      }
      t.css( "zIndex", o.zIndex );
    },
    stop: function( event, ui, instance ) {
      var o = instance.options;

      if ( o._zIndex ) {
        $( ui.helper ).css( "zIndex", o._zIndex );
      }
    }
  } );

  var widgetsDraggable = $.ui.draggable;


  /* eslint-disable max-len, camelcase */
  /*!
 * jQuery UI Datepicker 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Datepicker
//>>group: Widgets
//>>description: Displays a calendar from an input or inline for selecting dates.
//>>docs: http://api.jqueryui.com/datepicker/
//>>demos: http://jqueryui.com/datepicker/
//>>css.structure: ../../themes/base/core.css
//>>css.structure: ../../themes/base/datepicker.css
//>>css.theme: ../../themes/base/theme.css


  $.extend( $.ui, { datepicker: { version: "1.13.2" } } );

  var datepicker_instActive;

  function datepicker_getZindex( elem ) {
    var position, value;
    while ( elem.length && elem[ 0 ] !== document ) {

      // Ignore z-index if position is set to a value where z-index is ignored by the browser
      // This makes behavior of this function consistent across browsers
      // WebKit always returns auto if the element is positioned
      position = elem.css( "position" );
      if ( position === "absolute" || position === "relative" || position === "fixed" ) {

        // IE returns 0 when zIndex is not specified
        // other browsers return a string
        // we ignore the case of nested elements with an explicit value of 0
        // <div style="z-index: -10;"><div style="z-index: 0;"></div></div>
        value = parseInt( elem.css( "zIndex" ), 10 );
        if ( !isNaN( value ) && value !== 0 ) {
          return value;
        }
      }
      elem = elem.parent();
    }

    return 0;
  }

  /* Date picker manager.
   Use the singleton instance of this class, $.datepicker, to interact with the date picker.
   Settings for (groups of) date pickers are maintained in an instance object,
   allowing multiple different settings on the same page. */

  function Datepicker() {
    this._curInst = null; // The current instance in use
    this._keyEvent = false; // If the last event was a key event
    this._disabledInputs = []; // List of date picker inputs that have been disabled
    this._datepickerShowing = false; // True if the popup picker is showing , false if not
    this._inDialog = false; // True if showing within a "dialog", false if not
    this._mainDivId = "ui-datepicker-div"; // The ID of the main datepicker division
    this._inlineClass = "ui-datepicker-inline"; // The name of the inline marker class
    this._appendClass = "ui-datepicker-append"; // The name of the append marker class
    this._triggerClass = "ui-datepicker-trigger"; // The name of the trigger marker class
    this._dialogClass = "ui-datepicker-dialog"; // The name of the dialog marker class
    this._disableClass = "ui-datepicker-disabled"; // The name of the disabled covering marker class
    this._unselectableClass = "ui-datepicker-unselectable"; // The name of the unselectable cell marker class
    this._currentClass = "ui-datepicker-current-day"; // The name of the current day marker class
    this._dayOverClass = "ui-datepicker-days-cell-over"; // The name of the day hover marker class
    this.regional = []; // Available regional settings, indexed by language code
    this.regional[ "" ] = { // Default regional settings
      closeText: "Done", // Display text for close link
      prevText: "Prev", // Display text for previous month link
      nextText: "Next", // Display text for next month link
      currentText: "Today", // Display text for current month link
      monthNames: [ "January", "February", "March", "April", "May", "June",
        "July", "August", "September", "October", "November", "December" ], // Names of months for drop-down and formatting
      monthNamesShort: [ "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" ], // For formatting
      dayNames: [ "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" ], // For formatting
      dayNamesShort: [ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" ], // For formatting
      dayNamesMin: [ "Su", "Mo", "Tu", "We", "Th", "Fr", "Sa" ], // Column headings for days starting at Sunday
      weekHeader: "Wk", // Column header for week of the year
      dateFormat: "mm/dd/yy", // See format options on parseDate
      firstDay: 0, // The first day of the week, Sun = 0, Mon = 1, ...
      isRTL: false, // True if right-to-left language, false if left-to-right
      showMonthAfterYear: false, // True if the year select precedes month, false for month then year
      yearSuffix: "", // Additional text to append to the year in the month headers,
      selectMonthLabel: "Select month", // Invisible label for month selector
      selectYearLabel: "Select year" // Invisible label for year selector
    };
    this._defaults = { // Global defaults for all the date picker instances
      showOn: "focus", // "focus" for popup on focus,
      // "button" for trigger button, or "both" for either
      showAnim: "fadeIn", // Name of jQuery animation for popup
      showOptions: {}, // Options for enhanced animations
      defaultDate: null, // Used when field is blank: actual date,
      // +/-number for offset from today, null for today
      appendText: "", // Display text following the input box, e.g. showing the format
      buttonText: "...", // Text for trigger button
      buttonImage: "", // URL for trigger button image
      buttonImageOnly: false, // True if the image appears alone, false if it appears on a button
      hideIfNoPrevNext: false, // True to hide next/previous month links
      // if not applicable, false to just disable them
      navigationAsDateFormat: false, // True if date formatting applied to prev/today/next links
      gotoCurrent: false, // True if today link goes back to current selection instead
      changeMonth: false, // True if month can be selected directly, false if only prev/next
      changeYear: false, // True if year can be selected directly, false if only prev/next
      yearRange: "c-10:c+10", // Range of years to display in drop-down,
      // either relative to today's year (-nn:+nn), relative to currently displayed year
      // (c-nn:c+nn), absolute (nnnn:nnnn), or a combination of the above (nnnn:-n)
      showOtherMonths: false, // True to show dates in other months, false to leave blank
      selectOtherMonths: false, // True to allow selection of dates in other months, false for unselectable
      showWeek: false, // True to show week of the year, false to not show it
      calculateWeek: this.iso8601Week, // How to calculate the week of the year,
      // takes a Date and returns the number of the week for it
      shortYearCutoff: "+10", // Short year values < this are in the current century,
      // > this are in the previous century,
      // string value starting with "+" for current year + value
      minDate: null, // The earliest selectable date, or null for no limit
      maxDate: null, // The latest selectable date, or null for no limit
      duration: "fast", // Duration of display/closure
      beforeShowDay: null, // Function that takes a date and returns an array with
      // [0] = true if selectable, false if not, [1] = custom CSS class name(s) or "",
      // [2] = cell title (optional), e.g. $.datepicker.noWeekends
      beforeShow: null, // Function that takes an input field and
      // returns a set of custom settings for the date picker
      onSelect: null, // Define a callback function when a date is selected
      onChangeMonthYear: null, // Define a callback function when the month or year is changed
      onClose: null, // Define a callback function when the datepicker is closed
      onUpdateDatepicker: null, // Define a callback function when the datepicker is updated
      numberOfMonths: 1, // Number of months to show at a time
      showCurrentAtPos: 0, // The position in multipe months at which to show the current month (starting at 0)
      stepMonths: 1, // Number of months to step back/forward
      stepBigMonths: 12, // Number of months to step back/forward for the big links
      altField: "", // Selector for an alternate field to store selected dates into
      altFormat: "", // The date format to use for the alternate field
      constrainInput: true, // The input is constrained by the current date format
      showButtonPanel: false, // True to show button panel, false to not show it
      autoSize: false, // True to size the input for the date format, false to leave as is
      disabled: false // The initial disabled state
    };
    $.extend( this._defaults, this.regional[ "" ] );
    this.regional.en = $.extend( true, {}, this.regional[ "" ] );
    this.regional[ "en-US" ] = $.extend( true, {}, this.regional.en );
    this.dpDiv = datepicker_bindHover( $( "<div id='" + this._mainDivId + "' class='ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all'></div>" ) );
  }

  $.extend( Datepicker.prototype, {

    /* Class name added to elements to indicate already configured with a date picker. */
    markerClassName: "hasDatepicker",

    //Keep track of the maximum number of rows displayed (see #7043)
    maxRows: 4,

    // TODO rename to "widget" when switching to widget factory
    _widgetDatepicker: function() {
      return this.dpDiv;
    },

    /* Override the default settings for all instances of the date picker.
	 * @param  settings  object - the new settings to use as defaults (anonymous object)
	 * @return the manager object
	 */
    setDefaults: function( settings ) {
      datepicker_extendRemove( this._defaults, settings || {} );
      return this;
    },

    /* Attach the date picker to a jQuery selection.
	 * @param  target	element - the target input field or division or span
	 * @param  settings  object - the new settings to use for this date picker instance (anonymous)
	 */
    _attachDatepicker: function( target, settings ) {
      var nodeName, inline, inst;
      nodeName = target.nodeName.toLowerCase();
      inline = ( nodeName === "div" || nodeName === "span" );
      if ( !target.id ) {
        this.uuid += 1;
        target.id = "dp" + this.uuid;
      }
      inst = this._newInst( $( target ), inline );
      inst.settings = $.extend( {}, settings || {} );
      if ( nodeName === "input" ) {
        this._connectDatepicker( target, inst );
      } else if ( inline ) {
        this._inlineDatepicker( target, inst );
      }
    },

    /* Create a new instance object. */
    _newInst: function( target, inline ) {
      var id = target[ 0 ].id.replace( /([^A-Za-z0-9_\-])/g, "\\\\$1" ); // escape jQuery meta chars
      return { id: id, input: target, // associated target
        selectedDay: 0, selectedMonth: 0, selectedYear: 0, // current selection
        drawMonth: 0, drawYear: 0, // month being drawn
        inline: inline, // is datepicker inline or not
        dpDiv: ( !inline ? this.dpDiv : // presentation div
          datepicker_bindHover( $( "<div class='" + this._inlineClass + " ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all'></div>" ) ) ) };
    },

    /* Attach the date picker to an input field. */
    _connectDatepicker: function( target, inst ) {
      var input = $( target );
      inst.append = $( [] );
      inst.trigger = $( [] );
      if ( input.hasClass( this.markerClassName ) ) {
        return;
      }
      this._attachments( input, inst );
      input.addClass( this.markerClassName ).on( "keydown", this._doKeyDown ).
      on( "keypress", this._doKeyPress ).on( "keyup", this._doKeyUp );
      this._autoSize( inst );
      $.data( target, "datepicker", inst );

      //If disabled option is true, disable the datepicker once it has been attached to the input (see ticket #5665)
      if ( inst.settings.disabled ) {
        this._disableDatepicker( target );
      }
    },

    /* Make attachments based on settings. */
    _attachments: function( input, inst ) {
      var showOn, buttonText, buttonImage,
        appendText = this._get( inst, "appendText" ),
        isRTL = this._get( inst, "isRTL" );

      if ( inst.append ) {
        inst.append.remove();
      }
      if ( appendText ) {
        inst.append = $( "<span>" )
          .addClass( this._appendClass )
          .text( appendText );
        input[ isRTL ? "before" : "after" ]( inst.append );
      }

      input.off( "focus", this._showDatepicker );

      if ( inst.trigger ) {
        inst.trigger.remove();
      }

      showOn = this._get( inst, "showOn" );
      if ( showOn === "focus" || showOn === "both" ) { // pop-up date picker when in the marked field
        input.on( "focus", this._showDatepicker );
      }
      if ( showOn === "button" || showOn === "both" ) { // pop-up date picker when button clicked
        buttonText = this._get( inst, "buttonText" );
        buttonImage = this._get( inst, "buttonImage" );

        if ( this._get( inst, "buttonImageOnly" ) ) {
          inst.trigger = $( "<img>" )
            .addClass( this._triggerClass )
            .attr( {
              src: buttonImage,
              alt: buttonText,
              title: buttonText
            } );
        } else {
          inst.trigger = $( "<button type='button'>" )
            .addClass( this._triggerClass );
          if ( buttonImage ) {
            inst.trigger.html(
              $( "<img>" )
                .attr( {
                  src: buttonImage,
                  alt: buttonText,
                  title: buttonText
                } )
            );
          } else {
            inst.trigger.text( buttonText );
          }
        }

        input[ isRTL ? "before" : "after" ]( inst.trigger );
        inst.trigger.on( "click", function() {
          if ( $.datepicker._datepickerShowing && $.datepicker._lastInput === input[ 0 ] ) {
            $.datepicker._hideDatepicker();
          } else if ( $.datepicker._datepickerShowing && $.datepicker._lastInput !== input[ 0 ] ) {
            $.datepicker._hideDatepicker();
            $.datepicker._showDatepicker( input[ 0 ] );
          } else {
            $.datepicker._showDatepicker( input[ 0 ] );
          }
          return false;
        } );
      }
    },

    /* Apply the maximum length for the date format. */
    _autoSize: function( inst ) {
      if ( this._get( inst, "autoSize" ) && !inst.inline ) {
        var findMax, max, maxI, i,
          date = new Date( 2009, 12 - 1, 20 ), // Ensure double digits
          dateFormat = this._get( inst, "dateFormat" );

        if ( dateFormat.match( /[DM]/ ) ) {
          findMax = function( names ) {
            max = 0;
            maxI = 0;
            for ( i = 0; i < names.length; i++ ) {
              if ( names[ i ].length > max ) {
                max = names[ i ].length;
                maxI = i;
              }
            }
            return maxI;
          };
          date.setMonth( findMax( this._get( inst, ( dateFormat.match( /MM/ ) ?
            "monthNames" : "monthNamesShort" ) ) ) );
          date.setDate( findMax( this._get( inst, ( dateFormat.match( /DD/ ) ?
            "dayNames" : "dayNamesShort" ) ) ) + 20 - date.getDay() );
        }
        inst.input.attr( "size", this._formatDate( inst, date ).length );
      }
    },

    /* Attach an inline date picker to a div. */
    _inlineDatepicker: function( target, inst ) {
      var divSpan = $( target );
      if ( divSpan.hasClass( this.markerClassName ) ) {
        return;
      }
      divSpan.addClass( this.markerClassName ).append( inst.dpDiv );
      $.data( target, "datepicker", inst );
      this._setDate( inst, this._getDefaultDate( inst ), true );
      this._updateDatepicker( inst );
      this._updateAlternate( inst );

      //If disabled option is true, disable the datepicker before showing it (see ticket #5665)
      if ( inst.settings.disabled ) {
        this._disableDatepicker( target );
      }

      // Set display:block in place of inst.dpDiv.show() which won't work on disconnected elements
      // http://bugs.jqueryui.com/ticket/7552 - A Datepicker created on a detached div has zero height
      inst.dpDiv.css( "display", "block" );
    },

    /* Pop-up the date picker in a "dialog" box.
	 * @param  input element - ignored
	 * @param  date	string or Date - the initial date to display
	 * @param  onSelect  function - the function to call when a date is selected
	 * @param  settings  object - update the dialog date picker instance's settings (anonymous object)
	 * @param  pos int[2] - coordinates for the dialog's position within the screen or
	 *					event - with x/y coordinates or
	 *					leave empty for default (screen centre)
	 * @return the manager object
	 */
    _dialogDatepicker: function( input, date, onSelect, settings, pos ) {
      var id, browserWidth, browserHeight, scrollX, scrollY,
        inst = this._dialogInst; // internal instance

      if ( !inst ) {
        this.uuid += 1;
        id = "dp" + this.uuid;
        this._dialogInput = $( "<input type='text' id='" + id +
          "' style='position: absolute; top: -100px; width: 0px;'/>" );
        this._dialogInput.on( "keydown", this._doKeyDown );
        $( "body" ).append( this._dialogInput );
        inst = this._dialogInst = this._newInst( this._dialogInput, false );
        inst.settings = {};
        $.data( this._dialogInput[ 0 ], "datepicker", inst );
      }
      datepicker_extendRemove( inst.settings, settings || {} );
      date = ( date && date.constructor === Date ? this._formatDate( inst, date ) : date );
      this._dialogInput.val( date );

      this._pos = ( pos ? ( pos.length ? pos : [ pos.pageX, pos.pageY ] ) : null );
      if ( !this._pos ) {
        browserWidth = document.documentElement.clientWidth;
        browserHeight = document.documentElement.clientHeight;
        scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
        scrollY = document.documentElement.scrollTop || document.body.scrollTop;
        this._pos = // should use actual width/height below
          [ ( browserWidth / 2 ) - 100 + scrollX, ( browserHeight / 2 ) - 150 + scrollY ];
      }

      // Move input on screen for focus, but hidden behind dialog
      this._dialogInput.css( "left", ( this._pos[ 0 ] + 20 ) + "px" ).css( "top", this._pos[ 1 ] + "px" );
      inst.settings.onSelect = onSelect;
      this._inDialog = true;
      this.dpDiv.addClass( this._dialogClass );
      this._showDatepicker( this._dialogInput[ 0 ] );
      if ( $.blockUI ) {
        $.blockUI( this.dpDiv );
      }
      $.data( this._dialogInput[ 0 ], "datepicker", inst );
      return this;
    },

    /* Detach a datepicker from its control.
	 * @param  target	element - the target input field or division or span
	 */
    _destroyDatepicker: function( target ) {
      var nodeName,
        $target = $( target ),
        inst = $.data( target, "datepicker" );

      if ( !$target.hasClass( this.markerClassName ) ) {
        return;
      }

      nodeName = target.nodeName.toLowerCase();
      $.removeData( target, "datepicker" );
      if ( nodeName === "input" ) {
        inst.append.remove();
        inst.trigger.remove();
        $target.removeClass( this.markerClassName ).
        off( "focus", this._showDatepicker ).
        off( "keydown", this._doKeyDown ).
        off( "keypress", this._doKeyPress ).
        off( "keyup", this._doKeyUp );
      } else if ( nodeName === "div" || nodeName === "span" ) {
        $target.removeClass( this.markerClassName ).empty();
      }

      if ( datepicker_instActive === inst ) {
        datepicker_instActive = null;
        this._curInst = null;
      }
    },

    /* Enable the date picker to a jQuery selection.
	 * @param  target	element - the target input field or division or span
	 */
    _enableDatepicker: function( target ) {
      var nodeName, inline,
        $target = $( target ),
        inst = $.data( target, "datepicker" );

      if ( !$target.hasClass( this.markerClassName ) ) {
        return;
      }

      nodeName = target.nodeName.toLowerCase();
      if ( nodeName === "input" ) {
        target.disabled = false;
        inst.trigger.filter( "button" ).
        each( function() {
          this.disabled = false;
        } ).end().
        filter( "img" ).css( { opacity: "1.0", cursor: "" } );
      } else if ( nodeName === "div" || nodeName === "span" ) {
        inline = $target.children( "." + this._inlineClass );
        inline.children().removeClass( "ui-state-disabled" );
        inline.find( "select.ui-datepicker-month, select.ui-datepicker-year" ).
        prop( "disabled", false );
      }
      this._disabledInputs = $.map( this._disabledInputs,

        // Delete entry
        function( value ) {
          return ( value === target ? null : value );
        } );
    },

    /* Disable the date picker to a jQuery selection.
	 * @param  target	element - the target input field or division or span
	 */
    _disableDatepicker: function( target ) {
      var nodeName, inline,
        $target = $( target ),
        inst = $.data( target, "datepicker" );

      if ( !$target.hasClass( this.markerClassName ) ) {
        return;
      }

      nodeName = target.nodeName.toLowerCase();
      if ( nodeName === "input" ) {
        target.disabled = true;
        inst.trigger.filter( "button" ).
        each( function() {
          this.disabled = true;
        } ).end().
        filter( "img" ).css( { opacity: "0.5", cursor: "default" } );
      } else if ( nodeName === "div" || nodeName === "span" ) {
        inline = $target.children( "." + this._inlineClass );
        inline.children().addClass( "ui-state-disabled" );
        inline.find( "select.ui-datepicker-month, select.ui-datepicker-year" ).
        prop( "disabled", true );
      }
      this._disabledInputs = $.map( this._disabledInputs,

        // Delete entry
        function( value ) {
          return ( value === target ? null : value );
        } );
      this._disabledInputs[ this._disabledInputs.length ] = target;
    },

    /* Is the first field in a jQuery collection disabled as a datepicker?
	 * @param  target	element - the target input field or division or span
	 * @return boolean - true if disabled, false if enabled
	 */
    _isDisabledDatepicker: function( target ) {
      if ( !target ) {
        return false;
      }
      for ( var i = 0; i < this._disabledInputs.length; i++ ) {
        if ( this._disabledInputs[ i ] === target ) {
          return true;
        }
      }
      return false;
    },

    /* Retrieve the instance data for the target control.
	 * @param  target  element - the target input field or division or span
	 * @return  object - the associated instance data
	 * @throws  error if a jQuery problem getting data
	 */
    _getInst: function( target ) {
      try {
        return $.data( target, "datepicker" );
      } catch ( err ) {
        throw "Missing instance data for this datepicker";
      }
    },

    /* Update or retrieve the settings for a date picker attached to an input field or division.
	 * @param  target  element - the target input field or division or span
	 * @param  name	object - the new settings to update or
	 *				string - the name of the setting to change or retrieve,
	 *				when retrieving also "all" for all instance settings or
	 *				"defaults" for all global defaults
	 * @param  value   any - the new value for the setting
	 *				(omit if above is an object or to retrieve a value)
	 */
    _optionDatepicker: function( target, name, value ) {
      var settings, date, minDate, maxDate,
        inst = this._getInst( target );

      if ( arguments.length === 2 && typeof name === "string" ) {
        return ( name === "defaults" ? $.extend( {}, $.datepicker._defaults ) :
          ( inst ? ( name === "all" ? $.extend( {}, inst.settings ) :
            this._get( inst, name ) ) : null ) );
      }

      settings = name || {};
      if ( typeof name === "string" ) {
        settings = {};
        settings[ name ] = value;
      }

      if ( inst ) {
        if ( this._curInst === inst ) {
          this._hideDatepicker();
        }

        date = this._getDateDatepicker( target, true );
        minDate = this._getMinMaxDate( inst, "min" );
        maxDate = this._getMinMaxDate( inst, "max" );
        datepicker_extendRemove( inst.settings, settings );

        // reformat the old minDate/maxDate values if dateFormat changes and a new minDate/maxDate isn't provided
        if ( minDate !== null && settings.dateFormat !== undefined && settings.minDate === undefined ) {
          inst.settings.minDate = this._formatDate( inst, minDate );
        }
        if ( maxDate !== null && settings.dateFormat !== undefined && settings.maxDate === undefined ) {
          inst.settings.maxDate = this._formatDate( inst, maxDate );
        }
        if ( "disabled" in settings ) {
          if ( settings.disabled ) {
            this._disableDatepicker( target );
          } else {
            this._enableDatepicker( target );
          }
        }
        this._attachments( $( target ), inst );
        this._autoSize( inst );
        this._setDate( inst, date );
        this._updateAlternate( inst );
        this._updateDatepicker( inst );
      }
    },

    // Change method deprecated
    _changeDatepicker: function( target, name, value ) {
      this._optionDatepicker( target, name, value );
    },

    /* Redraw the date picker attached to an input field or division.
	 * @param  target  element - the target input field or division or span
	 */
    _refreshDatepicker: function( target ) {
      var inst = this._getInst( target );
      if ( inst ) {
        this._updateDatepicker( inst );
      }
    },

    /* Set the dates for a jQuery selection.
	 * @param  target element - the target input field or division or span
	 * @param  date	Date - the new date
	 */
    _setDateDatepicker: function( target, date ) {
      var inst = this._getInst( target );
      if ( inst ) {
        this._setDate( inst, date );
        this._updateDatepicker( inst );
        this._updateAlternate( inst );
      }
    },

    /* Get the date(s) for the first entry in a jQuery selection.
	 * @param  target element - the target input field or division or span
	 * @param  noDefault boolean - true if no default date is to be used
	 * @return Date - the current date
	 */
    _getDateDatepicker: function( target, noDefault ) {
      var inst = this._getInst( target );
      if ( inst && !inst.inline ) {
        this._setDateFromField( inst, noDefault );
      }
      return ( inst ? this._getDate( inst ) : null );
    },

    /* Handle keystrokes. */
    _doKeyDown: function( event ) {
      var onSelect, dateStr, sel,
        inst = $.datepicker._getInst( event.target ),
        handled = true,
        isRTL = inst.dpDiv.is( ".ui-datepicker-rtl" );

      inst._keyEvent = true;
      if ( $.datepicker._datepickerShowing ) {
        switch ( event.keyCode ) {
          case 9: $.datepicker._hideDatepicker();
            handled = false;
            break; // hide on tab out
          case 13: sel = $( "td." + $.datepicker._dayOverClass + ":not(." +
            $.datepicker._currentClass + ")", inst.dpDiv );
            if ( sel[ 0 ] ) {
              $.datepicker._selectDay( event.target, inst.selectedMonth, inst.selectedYear, sel[ 0 ] );
            }

            onSelect = $.datepicker._get( inst, "onSelect" );
            if ( onSelect ) {
              dateStr = $.datepicker._formatDate( inst );

              // Trigger custom callback
              onSelect.apply( ( inst.input ? inst.input[ 0 ] : null ), [ dateStr, inst ] );
            } else {
              $.datepicker._hideDatepicker();
            }

            return false; // don't submit the form
          case 27: $.datepicker._hideDatepicker();
            break; // hide on escape
          case 33: $.datepicker._adjustDate( event.target, ( event.ctrlKey ?
            -$.datepicker._get( inst, "stepBigMonths" ) :
            -$.datepicker._get( inst, "stepMonths" ) ), "M" );
            break; // previous month/year on page up/+ ctrl
          case 34: $.datepicker._adjustDate( event.target, ( event.ctrlKey ?
            +$.datepicker._get( inst, "stepBigMonths" ) :
            +$.datepicker._get( inst, "stepMonths" ) ), "M" );
            break; // next month/year on page down/+ ctrl
          case 35: if ( event.ctrlKey || event.metaKey ) {
            $.datepicker._clearDate( event.target );
          }
            handled = event.ctrlKey || event.metaKey;
            break; // clear on ctrl or command +end
          case 36: if ( event.ctrlKey || event.metaKey ) {
            $.datepicker._gotoToday( event.target );
          }
            handled = event.ctrlKey || event.metaKey;
            break; // current on ctrl or command +home
          case 37: if ( event.ctrlKey || event.metaKey ) {
            $.datepicker._adjustDate( event.target, ( isRTL ? +1 : -1 ), "D" );
          }
            handled = event.ctrlKey || event.metaKey;

            // -1 day on ctrl or command +left
            if ( event.originalEvent.altKey ) {
              $.datepicker._adjustDate( event.target, ( event.ctrlKey ?
                -$.datepicker._get( inst, "stepBigMonths" ) :
                -$.datepicker._get( inst, "stepMonths" ) ), "M" );
            }

            // next month/year on alt +left on Mac
            break;
          case 38: if ( event.ctrlKey || event.metaKey ) {
            $.datepicker._adjustDate( event.target, -7, "D" );
          }
            handled = event.ctrlKey || event.metaKey;
            break; // -1 week on ctrl or command +up
          case 39: if ( event.ctrlKey || event.metaKey ) {
            $.datepicker._adjustDate( event.target, ( isRTL ? -1 : +1 ), "D" );
          }
            handled = event.ctrlKey || event.metaKey;

            // +1 day on ctrl or command +right
            if ( event.originalEvent.altKey ) {
              $.datepicker._adjustDate( event.target, ( event.ctrlKey ?
                +$.datepicker._get( inst, "stepBigMonths" ) :
                +$.datepicker._get( inst, "stepMonths" ) ), "M" );
            }

            // next month/year on alt +right
            break;
          case 40: if ( event.ctrlKey || event.metaKey ) {
            $.datepicker._adjustDate( event.target, +7, "D" );
          }
            handled = event.ctrlKey || event.metaKey;
            break; // +1 week on ctrl or command +down
          default: handled = false;
        }
      } else if ( event.keyCode === 36 && event.ctrlKey ) { // display the date picker on ctrl+home
        $.datepicker._showDatepicker( this );
      } else {
        handled = false;
      }

      if ( handled ) {
        event.preventDefault();
        event.stopPropagation();
      }
    },

    /* Filter entered characters - based on date format. */
    _doKeyPress: function( event ) {
      var chars, chr,
        inst = $.datepicker._getInst( event.target );

      if ( $.datepicker._get( inst, "constrainInput" ) ) {
        chars = $.datepicker._possibleChars( $.datepicker._get( inst, "dateFormat" ) );
        chr = String.fromCharCode( event.charCode == null ? event.keyCode : event.charCode );
        return event.ctrlKey || event.metaKey || ( chr < " " || !chars || chars.indexOf( chr ) > -1 );
      }
    },

    /* Synchronise manual entry and field/alternate field. */
    _doKeyUp: function( event ) {
      var date,
        inst = $.datepicker._getInst( event.target );

      if ( inst.input.val() !== inst.lastVal ) {
        try {
          date = $.datepicker.parseDate( $.datepicker._get( inst, "dateFormat" ),
            ( inst.input ? inst.input.val() : null ),
            $.datepicker._getFormatConfig( inst ) );

          if ( date ) { // only if valid
            $.datepicker._setDateFromField( inst );
            $.datepicker._updateAlternate( inst );
            $.datepicker._updateDatepicker( inst );
          }
        } catch ( err ) {
        }
      }
      return true;
    },

    /* Pop-up the date picker for a given input field.
	 * If false returned from beforeShow event handler do not show.
	 * @param  input  element - the input field attached to the date picker or
	 *					event - if triggered by focus
	 */
    _showDatepicker: function( input ) {
      input = input.target || input;
      if ( input.nodeName.toLowerCase() !== "input" ) { // find from button/image trigger
        input = $( "input", input.parentNode )[ 0 ];
      }

      if ( $.datepicker._isDisabledDatepicker( input ) || $.datepicker._lastInput === input ) { // already here
        return;
      }

      var inst, beforeShow, beforeShowSettings, isFixed,
        offset, showAnim, duration;

      inst = $.datepicker._getInst( input );
      if ( $.datepicker._curInst && $.datepicker._curInst !== inst ) {
        $.datepicker._curInst.dpDiv.stop( true, true );
        if ( inst && $.datepicker._datepickerShowing ) {
          $.datepicker._hideDatepicker( $.datepicker._curInst.input[ 0 ] );
        }
      }

      beforeShow = $.datepicker._get( inst, "beforeShow" );
      beforeShowSettings = beforeShow ? beforeShow.apply( input, [ input, inst ] ) : {};
      if ( beforeShowSettings === false ) {
        return;
      }
      datepicker_extendRemove( inst.settings, beforeShowSettings );

      inst.lastVal = null;
      $.datepicker._lastInput = input;
      $.datepicker._setDateFromField( inst );

      if ( $.datepicker._inDialog ) { // hide cursor
        input.value = "";
      }
      if ( !$.datepicker._pos ) { // position below input
        $.datepicker._pos = $.datepicker._findPos( input );
        $.datepicker._pos[ 1 ] += input.offsetHeight; // add the height
      }

      isFixed = false;
      $( input ).parents().each( function() {
        isFixed |= $( this ).css( "position" ) === "fixed";
        return !isFixed;
      } );

      offset = { left: $.datepicker._pos[ 0 ], top: $.datepicker._pos[ 1 ] };
      $.datepicker._pos = null;

      //to avoid flashes on Firefox
      inst.dpDiv.empty();

      // determine sizing offscreen
      inst.dpDiv.css( { position: "absolute", display: "block", top: "-1000px" } );
      $.datepicker._updateDatepicker( inst );

      // fix width for dynamic number of date pickers
      // and adjust position before showing
      offset = $.datepicker._checkOffset( inst, offset, isFixed );
      inst.dpDiv.css( { position: ( $.datepicker._inDialog && $.blockUI ?
          "static" : ( isFixed ? "fixed" : "absolute" ) ), display: "none",
        left: offset.left + "px", top: offset.top + "px" } );

      if ( !inst.inline ) {
        showAnim = $.datepicker._get( inst, "showAnim" );
        duration = $.datepicker._get( inst, "duration" );
        inst.dpDiv.css( "z-index", datepicker_getZindex( $( input ) ) + 1 );
        $.datepicker._datepickerShowing = true;

        if ( $.effects && $.effects.effect[ showAnim ] ) {
          inst.dpDiv.show( showAnim, $.datepicker._get( inst, "showOptions" ), duration );
        } else {
          inst.dpDiv[ showAnim || "show" ]( showAnim ? duration : null );
        }

        if ( $.datepicker._shouldFocusInput( inst ) ) {
          inst.input.trigger( "focus" );
        }

        $.datepicker._curInst = inst;
      }
    },

    /* Generate the date picker content. */
    _updateDatepicker: function( inst ) {
      this.maxRows = 4; //Reset the max number of rows being displayed (see #7043)
      datepicker_instActive = inst; // for delegate hover events
      inst.dpDiv.empty().append( this._generateHTML( inst ) );
      this._attachHandlers( inst );

      var origyearshtml,
        numMonths = this._getNumberOfMonths( inst ),
        cols = numMonths[ 1 ],
        width = 17,
        activeCell = inst.dpDiv.find( "." + this._dayOverClass + " a" ),
        onUpdateDatepicker = $.datepicker._get( inst, "onUpdateDatepicker" );

      if ( activeCell.length > 0 ) {
        datepicker_handleMouseover.apply( activeCell.get( 0 ) );
      }

      inst.dpDiv.removeClass( "ui-datepicker-multi-2 ui-datepicker-multi-3 ui-datepicker-multi-4" ).width( "" );
      if ( cols > 1 ) {
        inst.dpDiv.addClass( "ui-datepicker-multi-" + cols ).css( "width", ( width * cols ) + "em" );
      }
      inst.dpDiv[ ( numMonths[ 0 ] !== 1 || numMonths[ 1 ] !== 1 ? "add" : "remove" ) +
      "Class" ]( "ui-datepicker-multi" );
      inst.dpDiv[ ( this._get( inst, "isRTL" ) ? "add" : "remove" ) +
      "Class" ]( "ui-datepicker-rtl" );

      if ( inst === $.datepicker._curInst && $.datepicker._datepickerShowing && $.datepicker._shouldFocusInput( inst ) ) {
        inst.input.trigger( "focus" );
      }

      // Deffered render of the years select (to avoid flashes on Firefox)
      if ( inst.yearshtml ) {
        origyearshtml = inst.yearshtml;
        setTimeout( function() {

          //assure that inst.yearshtml didn't change.
          if ( origyearshtml === inst.yearshtml && inst.yearshtml ) {
            inst.dpDiv.find( "select.ui-datepicker-year" ).first().replaceWith( inst.yearshtml );
          }
          origyearshtml = inst.yearshtml = null;
        }, 0 );
      }

      if ( onUpdateDatepicker ) {
        onUpdateDatepicker.apply( ( inst.input ? inst.input[ 0 ] : null ), [ inst ] );
      }
    },

    // #6694 - don't focus the input if it's already focused
    // this breaks the change event in IE
    // Support: IE and jQuery <1.9
    _shouldFocusInput: function( inst ) {
      return inst.input && inst.input.is( ":visible" ) && !inst.input.is( ":disabled" ) && !inst.input.is( ":focus" );
    },

    /* Check positioning to remain on screen. */
    _checkOffset: function( inst, offset, isFixed ) {
      var dpWidth = inst.dpDiv.outerWidth(),
        dpHeight = inst.dpDiv.outerHeight(),
        inputWidth = inst.input ? inst.input.outerWidth() : 0,
        inputHeight = inst.input ? inst.input.outerHeight() : 0,
        viewWidth = document.documentElement.clientWidth + ( isFixed ? 0 : $( document ).scrollLeft() ),
        viewHeight = document.documentElement.clientHeight + ( isFixed ? 0 : $( document ).scrollTop() );

      offset.left -= ( this._get( inst, "isRTL" ) ? ( dpWidth - inputWidth ) : 0 );
      offset.left -= ( isFixed && offset.left === inst.input.offset().left ) ? $( document ).scrollLeft() : 0;
      offset.top -= ( isFixed && offset.top === ( inst.input.offset().top + inputHeight ) ) ? $( document ).scrollTop() : 0;

      // Now check if datepicker is showing outside window viewport - move to a better place if so.
      offset.left -= Math.min( offset.left, ( offset.left + dpWidth > viewWidth && viewWidth > dpWidth ) ?
        Math.abs( offset.left + dpWidth - viewWidth ) : 0 );
      offset.top -= Math.min( offset.top, ( offset.top + dpHeight > viewHeight && viewHeight > dpHeight ) ?
        Math.abs( dpHeight + inputHeight ) : 0 );

      return offset;
    },

    /* Find an object's position on the screen. */
    _findPos: function( obj ) {
      var position,
        inst = this._getInst( obj ),
        isRTL = this._get( inst, "isRTL" );

      while ( obj && ( obj.type === "hidden" || obj.nodeType !== 1 || $.expr.pseudos.hidden( obj ) ) ) {
        obj = obj[ isRTL ? "previousSibling" : "nextSibling" ];
      }

      position = $( obj ).offset();
      return [ position.left, position.top ];
    },

    /* Hide the date picker from view.
	 * @param  input  element - the input field attached to the date picker
	 */
    _hideDatepicker: function( input ) {
      var showAnim, duration, postProcess, onClose,
        inst = this._curInst;

      if ( !inst || ( input && inst !== $.data( input, "datepicker" ) ) ) {
        return;
      }

      if ( this._datepickerShowing ) {
        showAnim = this._get( inst, "showAnim" );
        duration = this._get( inst, "duration" );
        postProcess = function() {
          $.datepicker._tidyDialog( inst );
        };

        // DEPRECATED: after BC for 1.8.x $.effects[ showAnim ] is not needed
        if ( $.effects && ( $.effects.effect[ showAnim ] || $.effects[ showAnim ] ) ) {
          inst.dpDiv.hide( showAnim, $.datepicker._get( inst, "showOptions" ), duration, postProcess );
        } else {
          inst.dpDiv[ ( showAnim === "slideDown" ? "slideUp" :
            ( showAnim === "fadeIn" ? "fadeOut" : "hide" ) ) ]( ( showAnim ? duration : null ), postProcess );
        }

        if ( !showAnim ) {
          postProcess();
        }
        this._datepickerShowing = false;

        onClose = this._get( inst, "onClose" );
        if ( onClose ) {
          onClose.apply( ( inst.input ? inst.input[ 0 ] : null ), [ ( inst.input ? inst.input.val() : "" ), inst ] );
        }

        this._lastInput = null;
        if ( this._inDialog ) {
          this._dialogInput.css( { position: "absolute", left: "0", top: "-100px" } );
          if ( $.blockUI ) {
            $.unblockUI();
            $( "body" ).append( this.dpDiv );
          }
        }
        this._inDialog = false;
      }
    },

    /* Tidy up after a dialog display. */
    _tidyDialog: function( inst ) {
      inst.dpDiv.removeClass( this._dialogClass ).off( ".ui-datepicker-calendar" );
    },

    /* Close date picker if clicked elsewhere. */
    _checkExternalClick: function( event ) {
      if ( !$.datepicker._curInst ) {
        return;
      }

      var $target = $( event.target ),
        inst = $.datepicker._getInst( $target[ 0 ] );

      if ( ( ( $target[ 0 ].id !== $.datepicker._mainDivId &&
          $target.parents( "#" + $.datepicker._mainDivId ).length === 0 &&
          !$target.hasClass( $.datepicker.markerClassName ) &&
          !$target.closest( "." + $.datepicker._triggerClass ).length &&
          $.datepicker._datepickerShowing && !( $.datepicker._inDialog && $.blockUI ) ) ) ||
        ( $target.hasClass( $.datepicker.markerClassName ) && $.datepicker._curInst !== inst ) ) {
        $.datepicker._hideDatepicker();
      }
    },

    /* Adjust one of the date sub-fields. */
    _adjustDate: function( id, offset, period ) {
      var target = $( id ),
        inst = this._getInst( target[ 0 ] );

      if ( this._isDisabledDatepicker( target[ 0 ] ) ) {
        return;
      }
      this._adjustInstDate( inst, offset, period );
      this._updateDatepicker( inst );
    },

    /* Action for current link. */
    _gotoToday: function( id ) {
      var date,
        target = $( id ),
        inst = this._getInst( target[ 0 ] );

      if ( this._get( inst, "gotoCurrent" ) && inst.currentDay ) {
        inst.selectedDay = inst.currentDay;
        inst.drawMonth = inst.selectedMonth = inst.currentMonth;
        inst.drawYear = inst.selectedYear = inst.currentYear;
      } else {
        date = new Date();
        inst.selectedDay = date.getDate();
        inst.drawMonth = inst.selectedMonth = date.getMonth();
        inst.drawYear = inst.selectedYear = date.getFullYear();
      }
      this._notifyChange( inst );
      this._adjustDate( target );
    },

    /* Action for selecting a new month/year. */
    _selectMonthYear: function( id, select, period ) {
      var target = $( id ),
        inst = this._getInst( target[ 0 ] );

      inst[ "selected" + ( period === "M" ? "Month" : "Year" ) ] =
        inst[ "draw" + ( period === "M" ? "Month" : "Year" ) ] =
          parseInt( select.options[ select.selectedIndex ].value, 10 );

      this._notifyChange( inst );
      this._adjustDate( target );
    },

    /* Action for selecting a day. */
    _selectDay: function( id, month, year, td ) {
      var inst,
        target = $( id );

      if ( $( td ).hasClass( this._unselectableClass ) || this._isDisabledDatepicker( target[ 0 ] ) ) {
        return;
      }

      inst = this._getInst( target[ 0 ] );
      inst.selectedDay = inst.currentDay = parseInt( $( "a", td ).attr( "data-date" ) );
      inst.selectedMonth = inst.currentMonth = month;
      inst.selectedYear = inst.currentYear = year;
      this._selectDate( id, this._formatDate( inst,
        inst.currentDay, inst.currentMonth, inst.currentYear ) );
    },

    /* Erase the input field and hide the date picker. */
    _clearDate: function( id ) {
      var target = $( id );
      this._selectDate( target, "" );
    },

    /* Update the input field with the selected date. */
    _selectDate: function( id, dateStr ) {
      var onSelect,
        target = $( id ),
        inst = this._getInst( target[ 0 ] );

      dateStr = ( dateStr != null ? dateStr : this._formatDate( inst ) );
      if ( inst.input ) {
        inst.input.val( dateStr );
      }
      this._updateAlternate( inst );

      onSelect = this._get( inst, "onSelect" );
      if ( onSelect ) {
        onSelect.apply( ( inst.input ? inst.input[ 0 ] : null ), [ dateStr, inst ] );  // trigger custom callback
      } else if ( inst.input ) {
        inst.input.trigger( "change" ); // fire the change event
      }

      if ( inst.inline ) {
        this._updateDatepicker( inst );
      } else {
        this._hideDatepicker();
        this._lastInput = inst.input[ 0 ];
        if ( typeof( inst.input[ 0 ] ) !== "object" ) {
          inst.input.trigger( "focus" ); // restore focus
        }
        this._lastInput = null;
      }
    },

    /* Update any alternate field to synchronise with the main field. */
    _updateAlternate: function( inst ) {
      var altFormat, date, dateStr,
        altField = this._get( inst, "altField" );

      if ( altField ) { // update alternate field too
        altFormat = this._get( inst, "altFormat" ) || this._get( inst, "dateFormat" );
        date = this._getDate( inst );
        dateStr = this.formatDate( altFormat, date, this._getFormatConfig( inst ) );
        $( document ).find( altField ).val( dateStr );
      }
    },

    /* Set as beforeShowDay function to prevent selection of weekends.
	 * @param  date  Date - the date to customise
	 * @return [boolean, string] - is this date selectable?, what is its CSS class?
	 */
    noWeekends: function( date ) {
      var day = date.getDay();
      return [ ( day > 0 && day < 6 ), "" ];
    },

    /* Set as calculateWeek to determine the week of the year based on the ISO 8601 definition.
	 * @param  date  Date - the date to get the week for
	 * @return  number - the number of the week within the year that contains this date
	 */
    iso8601Week: function( date ) {
      var time,
        checkDate = new Date( date.getTime() );

      // Find Thursday of this week starting on Monday
      checkDate.setDate( checkDate.getDate() + 4 - ( checkDate.getDay() || 7 ) );

      time = checkDate.getTime();
      checkDate.setMonth( 0 ); // Compare with Jan 1
      checkDate.setDate( 1 );
      return Math.floor( Math.round( ( time - checkDate ) / 86400000 ) / 7 ) + 1;
    },

    /* Parse a string value into a date object.
	 * See formatDate below for the possible formats.
	 *
	 * @param  format string - the expected format of the date
	 * @param  value string - the date in the above format
	 * @param  settings Object - attributes include:
	 *					shortYearCutoff  number - the cutoff year for determining the century (optional)
	 *					dayNamesShort	string[7] - abbreviated names of the days from Sunday (optional)
	 *					dayNames		string[7] - names of the days from Sunday (optional)
	 *					monthNamesShort string[12] - abbreviated names of the months (optional)
	 *					monthNames		string[12] - names of the months (optional)
	 * @return  Date - the extracted date value or null if value is blank
	 */
    parseDate: function( format, value, settings ) {
      if ( format == null || value == null ) {
        throw "Invalid arguments";
      }

      value = ( typeof value === "object" ? value.toString() : value + "" );
      if ( value === "" ) {
        return null;
      }

      var iFormat, dim, extra,
        iValue = 0,
        shortYearCutoffTemp = ( settings ? settings.shortYearCutoff : null ) || this._defaults.shortYearCutoff,
        shortYearCutoff = ( typeof shortYearCutoffTemp !== "string" ? shortYearCutoffTemp :
          new Date().getFullYear() % 100 + parseInt( shortYearCutoffTemp, 10 ) ),
        dayNamesShort = ( settings ? settings.dayNamesShort : null ) || this._defaults.dayNamesShort,
        dayNames = ( settings ? settings.dayNames : null ) || this._defaults.dayNames,
        monthNamesShort = ( settings ? settings.monthNamesShort : null ) || this._defaults.monthNamesShort,
        monthNames = ( settings ? settings.monthNames : null ) || this._defaults.monthNames,
        year = -1,
        month = -1,
        day = -1,
        doy = -1,
        literal = false,
        date,

        // Check whether a format character is doubled
        lookAhead = function( match ) {
          var matches = ( iFormat + 1 < format.length && format.charAt( iFormat + 1 ) === match );
          if ( matches ) {
            iFormat++;
          }
          return matches;
        },

        // Extract a number from the string value
        getNumber = function( match ) {
          var isDoubled = lookAhead( match ),
            size = ( match === "@" ? 14 : ( match === "!" ? 20 :
              ( match === "y" && isDoubled ? 4 : ( match === "o" ? 3 : 2 ) ) ) ),
            minSize = ( match === "y" ? size : 1 ),
            digits = new RegExp( "^\\d{" + minSize + "," + size + "}" ),
            num = value.substring( iValue ).match( digits );
          if ( !num ) {
            throw "Missing number at position " + iValue;
          }
          iValue += num[ 0 ].length;
          return parseInt( num[ 0 ], 10 );
        },

        // Extract a name from the string value and convert to an index
        getName = function( match, shortNames, longNames ) {
          var index = -1,
            names = $.map( lookAhead( match ) ? longNames : shortNames, function( v, k ) {
              return [ [ k, v ] ];
            } ).sort( function( a, b ) {
              return -( a[ 1 ].length - b[ 1 ].length );
            } );

          $.each( names, function( i, pair ) {
            var name = pair[ 1 ];
            if ( value.substr( iValue, name.length ).toLowerCase() === name.toLowerCase() ) {
              index = pair[ 0 ];
              iValue += name.length;
              return false;
            }
          } );
          if ( index !== -1 ) {
            return index + 1;
          } else {
            throw "Unknown name at position " + iValue;
          }
        },

        // Confirm that a literal character matches the string value
        checkLiteral = function() {
          if ( value.charAt( iValue ) !== format.charAt( iFormat ) ) {
            throw "Unexpected literal at position " + iValue;
          }
          iValue++;
        };

      for ( iFormat = 0; iFormat < format.length; iFormat++ ) {
        if ( literal ) {
          if ( format.charAt( iFormat ) === "'" && !lookAhead( "'" ) ) {
            literal = false;
          } else {
            checkLiteral();
          }
        } else {
          switch ( format.charAt( iFormat ) ) {
            case "d":
              day = getNumber( "d" );
              break;
            case "D":
              getName( "D", dayNamesShort, dayNames );
              break;
            case "o":
              doy = getNumber( "o" );
              break;
            case "m":
              month = getNumber( "m" );
              break;
            case "M":
              month = getName( "M", monthNamesShort, monthNames );
              break;
            case "y":
              year = getNumber( "y" );
              break;
            case "@":
              date = new Date( getNumber( "@" ) );
              year = date.getFullYear();
              month = date.getMonth() + 1;
              day = date.getDate();
              break;
            case "!":
              date = new Date( ( getNumber( "!" ) - this._ticksTo1970 ) / 10000 );
              year = date.getFullYear();
              month = date.getMonth() + 1;
              day = date.getDate();
              break;
            case "'":
              if ( lookAhead( "'" ) ) {
                checkLiteral();
              } else {
                literal = true;
              }
              break;
            default:
              checkLiteral();
          }
        }
      }

      if ( iValue < value.length ) {
        extra = value.substr( iValue );
        if ( !/^\s+/.test( extra ) ) {
          throw "Extra/unparsed characters found in date: " + extra;
        }
      }

      if ( year === -1 ) {
        year = new Date().getFullYear();
      } else if ( year < 100 ) {
        year += new Date().getFullYear() - new Date().getFullYear() % 100 +
          ( year <= shortYearCutoff ? 0 : -100 );
      }

      if ( doy > -1 ) {
        month = 1;
        day = doy;
        do {
          dim = this._getDaysInMonth( year, month - 1 );
          if ( day <= dim ) {
            break;
          }
          month++;
          day -= dim;
        } while ( true );
      }

      date = this._daylightSavingAdjust( new Date( year, month - 1, day ) );
      if ( date.getFullYear() !== year || date.getMonth() + 1 !== month || date.getDate() !== day ) {
        throw "Invalid date"; // E.g. 31/02/00
      }
      return date;
    },

    /* Standard date formats. */
    ATOM: "yy-mm-dd", // RFC 3339 (ISO 8601)
    COOKIE: "D, dd M yy",
    ISO_8601: "yy-mm-dd",
    RFC_822: "D, d M y",
    RFC_850: "DD, dd-M-y",
    RFC_1036: "D, d M y",
    RFC_1123: "D, d M yy",
    RFC_2822: "D, d M yy",
    RSS: "D, d M y", // RFC 822
    TICKS: "!",
    TIMESTAMP: "@",
    W3C: "yy-mm-dd", // ISO 8601

    _ticksTo1970: ( ( ( 1970 - 1 ) * 365 + Math.floor( 1970 / 4 ) - Math.floor( 1970 / 100 ) +
      Math.floor( 1970 / 400 ) ) * 24 * 60 * 60 * 10000000 ),

    /* Format a date object into a string value.
	 * The format can be combinations of the following:
	 * d  - day of month (no leading zero)
	 * dd - day of month (two digit)
	 * o  - day of year (no leading zeros)
	 * oo - day of year (three digit)
	 * D  - day name short
	 * DD - day name long
	 * m  - month of year (no leading zero)
	 * mm - month of year (two digit)
	 * M  - month name short
	 * MM - month name long
	 * y  - year (two digit)
	 * yy - year (four digit)
	 * @ - Unix timestamp (ms since 01/01/1970)
	 * ! - Windows ticks (100ns since 01/01/0001)
	 * "..." - literal text
	 * '' - single quote
	 *
	 * @param  format string - the desired format of the date
	 * @param  date Date - the date value to format
	 * @param  settings Object - attributes include:
	 *					dayNamesShort	string[7] - abbreviated names of the days from Sunday (optional)
	 *					dayNames		string[7] - names of the days from Sunday (optional)
	 *					monthNamesShort string[12] - abbreviated names of the months (optional)
	 *					monthNames		string[12] - names of the months (optional)
	 * @return  string - the date in the above format
	 */
    formatDate: function( format, date, settings ) {
      if ( !date ) {
        return "";
      }

      var iFormat,
        dayNamesShort = ( settings ? settings.dayNamesShort : null ) || this._defaults.dayNamesShort,
        dayNames = ( settings ? settings.dayNames : null ) || this._defaults.dayNames,
        monthNamesShort = ( settings ? settings.monthNamesShort : null ) || this._defaults.monthNamesShort,
        monthNames = ( settings ? settings.monthNames : null ) || this._defaults.monthNames,

        // Check whether a format character is doubled
        lookAhead = function( match ) {
          var matches = ( iFormat + 1 < format.length && format.charAt( iFormat + 1 ) === match );
          if ( matches ) {
            iFormat++;
          }
          return matches;
        },

        // Format a number, with leading zero if necessary
        formatNumber = function( match, value, len ) {
          var num = "" + value;
          if ( lookAhead( match ) ) {
            while ( num.length < len ) {
              num = "0" + num;
            }
          }
          return num;
        },

        // Format a name, short or long as requested
        formatName = function( match, value, shortNames, longNames ) {
          return ( lookAhead( match ) ? longNames[ value ] : shortNames[ value ] );
        },
        output = "",
        literal = false;

      if ( date ) {
        for ( iFormat = 0; iFormat < format.length; iFormat++ ) {
          if ( literal ) {
            if ( format.charAt( iFormat ) === "'" && !lookAhead( "'" ) ) {
              literal = false;
            } else {
              output += format.charAt( iFormat );
            }
          } else {
            switch ( format.charAt( iFormat ) ) {
              case "d":
                output += formatNumber( "d", date.getDate(), 2 );
                break;
              case "D":
                output += formatName( "D", date.getDay(), dayNamesShort, dayNames );
                break;
              case "o":
                output += formatNumber( "o",
                  Math.round( ( new Date( date.getFullYear(), date.getMonth(), date.getDate() ).getTime() - new Date( date.getFullYear(), 0, 0 ).getTime() ) / 86400000 ), 3 );
                break;
              case "m":
                output += formatNumber( "m", date.getMonth() + 1, 2 );
                break;
              case "M":
                output += formatName( "M", date.getMonth(), monthNamesShort, monthNames );
                break;
              case "y":
                output += ( lookAhead( "y" ) ? date.getFullYear() :
                  ( date.getFullYear() % 100 < 10 ? "0" : "" ) + date.getFullYear() % 100 );
                break;
              case "@":
                output += date.getTime();
                break;
              case "!":
                output += date.getTime() * 10000 + this._ticksTo1970;
                break;
              case "'":
                if ( lookAhead( "'" ) ) {
                  output += "'";
                } else {
                  literal = true;
                }
                break;
              default:
                output += format.charAt( iFormat );
            }
          }
        }
      }
      return output;
    },

    /* Extract all possible characters from the date format. */
    _possibleChars: function( format ) {
      var iFormat,
        chars = "",
        literal = false,

        // Check whether a format character is doubled
        lookAhead = function( match ) {
          var matches = ( iFormat + 1 < format.length && format.charAt( iFormat + 1 ) === match );
          if ( matches ) {
            iFormat++;
          }
          return matches;
        };

      for ( iFormat = 0; iFormat < format.length; iFormat++ ) {
        if ( literal ) {
          if ( format.charAt( iFormat ) === "'" && !lookAhead( "'" ) ) {
            literal = false;
          } else {
            chars += format.charAt( iFormat );
          }
        } else {
          switch ( format.charAt( iFormat ) ) {
            case "d": case "m": case "y": case "@":
              chars += "0123456789";
              break;
            case "D": case "M":
              return null; // Accept anything
            case "'":
              if ( lookAhead( "'" ) ) {
                chars += "'";
              } else {
                literal = true;
              }
              break;
            default:
              chars += format.charAt( iFormat );
          }
        }
      }
      return chars;
    },

    /* Get a setting value, defaulting if necessary. */
    _get: function( inst, name ) {
      return inst.settings[ name ] !== undefined ?
        inst.settings[ name ] : this._defaults[ name ];
    },

    /* Parse existing date and initialise date picker. */
    _setDateFromField: function( inst, noDefault ) {
      if ( inst.input.val() === inst.lastVal ) {
        return;
      }

      var dateFormat = this._get( inst, "dateFormat" ),
        dates = inst.lastVal = inst.input ? inst.input.val() : null,
        defaultDate = this._getDefaultDate( inst ),
        date = defaultDate,
        settings = this._getFormatConfig( inst );

      try {
        date = this.parseDate( dateFormat, dates, settings ) || defaultDate;
      } catch ( event ) {
        dates = ( noDefault ? "" : dates );
      }
      inst.selectedDay = date.getDate();
      inst.drawMonth = inst.selectedMonth = date.getMonth();
      inst.drawYear = inst.selectedYear = date.getFullYear();
      inst.currentDay = ( dates ? date.getDate() : 0 );
      inst.currentMonth = ( dates ? date.getMonth() : 0 );
      inst.currentYear = ( dates ? date.getFullYear() : 0 );
      this._adjustInstDate( inst );
    },

    /* Retrieve the default date shown on opening. */
    _getDefaultDate: function( inst ) {
      return this._restrictMinMax( inst,
        this._determineDate( inst, this._get( inst, "defaultDate" ), new Date() ) );
    },

    /* A date may be specified as an exact value or a relative one. */
    _determineDate: function( inst, date, defaultDate ) {
      var offsetNumeric = function( offset ) {
          var date = new Date();
          date.setDate( date.getDate() + offset );
          return date;
        },
        offsetString = function( offset ) {
          try {
            return $.datepicker.parseDate( $.datepicker._get( inst, "dateFormat" ),
              offset, $.datepicker._getFormatConfig( inst ) );
          } catch ( e ) {

            // Ignore
          }

          var date = ( offset.toLowerCase().match( /^c/ ) ?
              $.datepicker._getDate( inst ) : null ) || new Date(),
            year = date.getFullYear(),
            month = date.getMonth(),
            day = date.getDate(),
            pattern = /([+\-]?[0-9]+)\s*(d|D|w|W|m|M|y|Y)?/g,
            matches = pattern.exec( offset );

          while ( matches ) {
            switch ( matches[ 2 ] || "d" ) {
              case "d" : case "D" :
                day += parseInt( matches[ 1 ], 10 ); break;
              case "w" : case "W" :
                day += parseInt( matches[ 1 ], 10 ) * 7; break;
              case "m" : case "M" :
                month += parseInt( matches[ 1 ], 10 );
                day = Math.min( day, $.datepicker._getDaysInMonth( year, month ) );
                break;
              case "y": case "Y" :
                year += parseInt( matches[ 1 ], 10 );
                day = Math.min( day, $.datepicker._getDaysInMonth( year, month ) );
                break;
            }
            matches = pattern.exec( offset );
          }
          return new Date( year, month, day );
        },
        newDate = ( date == null || date === "" ? defaultDate : ( typeof date === "string" ? offsetString( date ) :
          ( typeof date === "number" ? ( isNaN( date ) ? defaultDate : offsetNumeric( date ) ) : new Date( date.getTime() ) ) ) );

      newDate = ( newDate && newDate.toString() === "Invalid Date" ? defaultDate : newDate );
      if ( newDate ) {
        newDate.setHours( 0 );
        newDate.setMinutes( 0 );
        newDate.setSeconds( 0 );
        newDate.setMilliseconds( 0 );
      }
      return this._daylightSavingAdjust( newDate );
    },

    /* Handle switch to/from daylight saving.
	 * Hours may be non-zero on daylight saving cut-over:
	 * > 12 when midnight changeover, but then cannot generate
	 * midnight datetime, so jump to 1AM, otherwise reset.
	 * @param  date  (Date) the date to check
	 * @return  (Date) the corrected date
	 */
    _daylightSavingAdjust: function( date ) {
      if ( !date ) {
        return null;
      }
      date.setHours( date.getHours() > 12 ? date.getHours() + 2 : 0 );
      return date;
    },

    /* Set the date(s) directly. */
    _setDate: function( inst, date, noChange ) {
      var clear = !date,
        origMonth = inst.selectedMonth,
        origYear = inst.selectedYear,
        newDate = this._restrictMinMax( inst, this._determineDate( inst, date, new Date() ) );

      inst.selectedDay = inst.currentDay = newDate.getDate();
      inst.drawMonth = inst.selectedMonth = inst.currentMonth = newDate.getMonth();
      inst.drawYear = inst.selectedYear = inst.currentYear = newDate.getFullYear();
      if ( ( origMonth !== inst.selectedMonth || origYear !== inst.selectedYear ) && !noChange ) {
        this._notifyChange( inst );
      }
      this._adjustInstDate( inst );
      if ( inst.input ) {
        inst.input.val( clear ? "" : this._formatDate( inst ) );
      }
    },

    /* Retrieve the date(s) directly. */
    _getDate: function( inst ) {
      var startDate = ( !inst.currentYear || ( inst.input && inst.input.val() === "" ) ? null :
        this._daylightSavingAdjust( new Date(
          inst.currentYear, inst.currentMonth, inst.currentDay ) ) );
      return startDate;
    },

    /* Attach the onxxx handlers.  These are declared statically so
	 * they work with static code transformers like Caja.
	 */
    _attachHandlers: function( inst ) {
      var stepMonths = this._get( inst, "stepMonths" ),
        id = "#" + inst.id.replace( /\\\\/g, "\\" );
      inst.dpDiv.find( "[data-handler]" ).map( function() {
        var handler = {
          prev: function() {
            $.datepicker._adjustDate( id, -stepMonths, "M" );
          },
          next: function() {
            $.datepicker._adjustDate( id, +stepMonths, "M" );
          },
          hide: function() {
            $.datepicker._hideDatepicker();
          },
          today: function() {
            $.datepicker._gotoToday( id );
          },
          selectDay: function() {
            $.datepicker._selectDay( id, +this.getAttribute( "data-month" ), +this.getAttribute( "data-year" ), this );
            return false;
          },
          selectMonth: function() {
            $.datepicker._selectMonthYear( id, this, "M" );
            return false;
          },
          selectYear: function() {
            $.datepicker._selectMonthYear( id, this, "Y" );
            return false;
          }
        };
        $( this ).on( this.getAttribute( "data-event" ), handler[ this.getAttribute( "data-handler" ) ] );
      } );
    },

    /* Generate the HTML for the current state of the date picker. */
    _generateHTML: function( inst ) {
      var maxDraw, prevText, prev, nextText, next, currentText, gotoDate,
        controls, buttonPanel, firstDay, showWeek, dayNames, dayNamesMin,
        monthNames, monthNamesShort, beforeShowDay, showOtherMonths,
        selectOtherMonths, defaultDate, html, dow, row, group, col, selectedDate,
        cornerClass, calender, thead, day, daysInMonth, leadDays, curRows, numRows,
        printDate, dRow, tbody, daySettings, otherMonth, unselectable,
        tempDate = new Date(),
        today = this._daylightSavingAdjust(
          new Date( tempDate.getFullYear(), tempDate.getMonth(), tempDate.getDate() ) ), // clear time
        isRTL = this._get( inst, "isRTL" ),
        showButtonPanel = this._get( inst, "showButtonPanel" ),
        hideIfNoPrevNext = this._get( inst, "hideIfNoPrevNext" ),
        navigationAsDateFormat = this._get( inst, "navigationAsDateFormat" ),
        numMonths = this._getNumberOfMonths( inst ),
        showCurrentAtPos = this._get( inst, "showCurrentAtPos" ),
        stepMonths = this._get( inst, "stepMonths" ),
        isMultiMonth = ( numMonths[ 0 ] !== 1 || numMonths[ 1 ] !== 1 ),
        currentDate = this._daylightSavingAdjust( ( !inst.currentDay ? new Date( 9999, 9, 9 ) :
          new Date( inst.currentYear, inst.currentMonth, inst.currentDay ) ) ),
        minDate = this._getMinMaxDate( inst, "min" ),
        maxDate = this._getMinMaxDate( inst, "max" ),
        drawMonth = inst.drawMonth - showCurrentAtPos,
        drawYear = inst.drawYear;

      if ( drawMonth < 0 ) {
        drawMonth += 12;
        drawYear--;
      }
      if ( maxDate ) {
        maxDraw = this._daylightSavingAdjust( new Date( maxDate.getFullYear(),
          maxDate.getMonth() - ( numMonths[ 0 ] * numMonths[ 1 ] ) + 1, maxDate.getDate() ) );
        maxDraw = ( minDate && maxDraw < minDate ? minDate : maxDraw );
        while ( this._daylightSavingAdjust( new Date( drawYear, drawMonth, 1 ) ) > maxDraw ) {
          drawMonth--;
          if ( drawMonth < 0 ) {
            drawMonth = 11;
            drawYear--;
          }
        }
      }
      inst.drawMonth = drawMonth;
      inst.drawYear = drawYear;

      prevText = this._get( inst, "prevText" );
      prevText = ( !navigationAsDateFormat ? prevText : this.formatDate( prevText,
        this._daylightSavingAdjust( new Date( drawYear, drawMonth - stepMonths, 1 ) ),
        this._getFormatConfig( inst ) ) );

      if ( this._canAdjustMonth( inst, -1, drawYear, drawMonth ) ) {
        prev = $( "<a>" )
          .attr( {
            "class": "ui-datepicker-prev ui-corner-all",
            "data-handler": "prev",
            "data-event": "click",
            title: prevText
          } )
          .append(
            $( "<span>" )
              .addClass( "ui-icon ui-icon-circle-triangle-" +
                ( isRTL ? "e" : "w" ) )
              .text( prevText )
          )[ 0 ].outerHTML;
      } else if ( hideIfNoPrevNext ) {
        prev = "";
      } else {
        prev = $( "<a>" )
          .attr( {
            "class": "ui-datepicker-prev ui-corner-all ui-state-disabled",
            title: prevText
          } )
          .append(
            $( "<span>" )
              .addClass( "ui-icon ui-icon-circle-triangle-" +
                ( isRTL ? "e" : "w" ) )
              .text( prevText )
          )[ 0 ].outerHTML;
      }

      nextText = this._get( inst, "nextText" );
      nextText = ( !navigationAsDateFormat ? nextText : this.formatDate( nextText,
        this._daylightSavingAdjust( new Date( drawYear, drawMonth + stepMonths, 1 ) ),
        this._getFormatConfig( inst ) ) );

      if ( this._canAdjustMonth( inst, +1, drawYear, drawMonth ) ) {
        next = $( "<a>" )
          .attr( {
            "class": "ui-datepicker-next ui-corner-all",
            "data-handler": "next",
            "data-event": "click",
            title: nextText
          } )
          .append(
            $( "<span>" )
              .addClass( "ui-icon ui-icon-circle-triangle-" +
                ( isRTL ? "w" : "e" ) )
              .text( nextText )
          )[ 0 ].outerHTML;
      } else if ( hideIfNoPrevNext ) {
        next = "";
      } else {
        next = $( "<a>" )
          .attr( {
            "class": "ui-datepicker-next ui-corner-all ui-state-disabled",
            title: nextText
          } )
          .append(
            $( "<span>" )
              .attr( "class", "ui-icon ui-icon-circle-triangle-" +
                ( isRTL ? "w" : "e" ) )
              .text( nextText )
          )[ 0 ].outerHTML;
      }

      currentText = this._get( inst, "currentText" );
      gotoDate = ( this._get( inst, "gotoCurrent" ) && inst.currentDay ? currentDate : today );
      currentText = ( !navigationAsDateFormat ? currentText :
        this.formatDate( currentText, gotoDate, this._getFormatConfig( inst ) ) );

      controls = "";
      if ( !inst.inline ) {
        controls = $( "<button>" )
          .attr( {
            type: "button",
            "class": "ui-datepicker-close ui-state-default ui-priority-primary ui-corner-all",
            "data-handler": "hide",
            "data-event": "click"
          } )
          .text( this._get( inst, "closeText" ) )[ 0 ].outerHTML;
      }

      buttonPanel = "";
      if ( showButtonPanel ) {
        buttonPanel = $( "<div class='ui-datepicker-buttonpane ui-widget-content'>" )
          .append( isRTL ? controls : "" )
          .append( this._isInRange( inst, gotoDate ) ?
            $( "<button>" )
              .attr( {
                type: "button",
                "class": "ui-datepicker-current ui-state-default ui-priority-secondary ui-corner-all",
                "data-handler": "today",
                "data-event": "click"
              } )
              .text( currentText ) :
            "" )
          .append( isRTL ? "" : controls )[ 0 ].outerHTML;
      }

      firstDay = parseInt( this._get( inst, "firstDay" ), 10 );
      firstDay = ( isNaN( firstDay ) ? 0 : firstDay );

      showWeek = this._get( inst, "showWeek" );
      dayNames = this._get( inst, "dayNames" );
      dayNamesMin = this._get( inst, "dayNamesMin" );
      monthNames = this._get( inst, "monthNames" );
      monthNamesShort = this._get( inst, "monthNamesShort" );
      beforeShowDay = this._get( inst, "beforeShowDay" );
      showOtherMonths = this._get( inst, "showOtherMonths" );
      selectOtherMonths = this._get( inst, "selectOtherMonths" );
      defaultDate = this._getDefaultDate( inst );
      html = "";

      for ( row = 0; row < numMonths[ 0 ]; row++ ) {
        group = "";
        this.maxRows = 4;
        for ( col = 0; col < numMonths[ 1 ]; col++ ) {
          selectedDate = this._daylightSavingAdjust( new Date( drawYear, drawMonth, inst.selectedDay ) );
          cornerClass = " ui-corner-all";
          calender = "";
          if ( isMultiMonth ) {
            calender += "<div class='ui-datepicker-group";
            if ( numMonths[ 1 ] > 1 ) {
              switch ( col ) {
                case 0: calender += " ui-datepicker-group-first";
                  cornerClass = " ui-corner-" + ( isRTL ? "right" : "left" ); break;
                case numMonths[ 1 ] - 1: calender += " ui-datepicker-group-last";
                  cornerClass = " ui-corner-" + ( isRTL ? "left" : "right" ); break;
                default: calender += " ui-datepicker-group-middle"; cornerClass = ""; break;
              }
            }
            calender += "'>";
          }
          calender += "<div class='ui-datepicker-header ui-widget-header ui-helper-clearfix" + cornerClass + "'>" +
            ( /all|left/.test( cornerClass ) && row === 0 ? ( isRTL ? next : prev ) : "" ) +
            ( /all|right/.test( cornerClass ) && row === 0 ? ( isRTL ? prev : next ) : "" ) +
            this._generateMonthYearHeader( inst, drawMonth, drawYear, minDate, maxDate,
              row > 0 || col > 0, monthNames, monthNamesShort ) + // draw month headers
            "</div><table class='ui-datepicker-calendar'><thead>" +
            "<tr>";
          thead = ( showWeek ? "<th class='ui-datepicker-week-col'>" + this._get( inst, "weekHeader" ) + "</th>" : "" );
          for ( dow = 0; dow < 7; dow++ ) { // days of the week
            day = ( dow + firstDay ) % 7;
            thead += "<th scope='col'" + ( ( dow + firstDay + 6 ) % 7 >= 5 ? " class='ui-datepicker-week-end'" : "" ) + ">" +
              "<span title='" + dayNames[ day ] + "'>" + dayNamesMin[ day ] + "</span></th>";
          }
          calender += thead + "</tr></thead><tbody>";
          daysInMonth = this._getDaysInMonth( drawYear, drawMonth );
          if ( drawYear === inst.selectedYear && drawMonth === inst.selectedMonth ) {
            inst.selectedDay = Math.min( inst.selectedDay, daysInMonth );
          }
          leadDays = ( this._getFirstDayOfMonth( drawYear, drawMonth ) - firstDay + 7 ) % 7;
          curRows = Math.ceil( ( leadDays + daysInMonth ) / 7 ); // calculate the number of rows to generate
          numRows = ( isMultiMonth ? this.maxRows > curRows ? this.maxRows : curRows : curRows ); //If multiple months, use the higher number of rows (see #7043)
          this.maxRows = numRows;
          printDate = this._daylightSavingAdjust( new Date( drawYear, drawMonth, 1 - leadDays ) );
          for ( dRow = 0; dRow < numRows; dRow++ ) { // create date picker rows
            calender += "<tr>";
            tbody = ( !showWeek ? "" : "<td class='ui-datepicker-week-col'>" +
              this._get( inst, "calculateWeek" )( printDate ) + "</td>" );
            for ( dow = 0; dow < 7; dow++ ) { // create date picker days
              daySettings = ( beforeShowDay ?
                beforeShowDay.apply( ( inst.input ? inst.input[ 0 ] : null ), [ printDate ] ) : [ true, "" ] );
              otherMonth = ( printDate.getMonth() !== drawMonth );
              unselectable = ( otherMonth && !selectOtherMonths ) || !daySettings[ 0 ] ||
                ( minDate && printDate < minDate ) || ( maxDate && printDate > maxDate );
              tbody += "<td class='" +
                ( ( dow + firstDay + 6 ) % 7 >= 5 ? " ui-datepicker-week-end" : "" ) + // highlight weekends
                ( otherMonth ? " ui-datepicker-other-month" : "" ) + // highlight days from other months
                ( ( printDate.getTime() === selectedDate.getTime() && drawMonth === inst.selectedMonth && inst._keyEvent ) || // user pressed key
                ( defaultDate.getTime() === printDate.getTime() && defaultDate.getTime() === selectedDate.getTime() ) ?

                  // or defaultDate is current printedDate and defaultDate is selectedDate
                  " " + this._dayOverClass : "" ) + // highlight selected day
                ( unselectable ? " " + this._unselectableClass + " ui-state-disabled" : "" ) +  // highlight unselectable days
                ( otherMonth && !showOtherMonths ? "" : " " + daySettings[ 1 ] + // highlight custom dates
                  ( printDate.getTime() === currentDate.getTime() ? " " + this._currentClass : "" ) + // highlight selected day
                  ( printDate.getTime() === today.getTime() ? " ui-datepicker-today" : "" ) ) + "'" + // highlight today (if different)
                ( ( !otherMonth || showOtherMonths ) && daySettings[ 2 ] ? " title='" + daySettings[ 2 ].replace( /'/g, "&#39;" ) + "'" : "" ) + // cell title
                ( unselectable ? "" : " data-handler='selectDay' data-event='click' data-month='" + printDate.getMonth() + "' data-year='" + printDate.getFullYear() + "'" ) + ">" + // actions
                ( otherMonth && !showOtherMonths ? "&#xa0;" : // display for other months
                  ( unselectable ? "<span class='ui-state-default'>" + printDate.getDate() + "</span>" : "<a class='ui-state-default" +
                    ( printDate.getTime() === today.getTime() ? " ui-state-highlight" : "" ) +
                    ( printDate.getTime() === currentDate.getTime() ? " ui-state-active" : "" ) + // highlight selected day
                    ( otherMonth ? " ui-priority-secondary" : "" ) + // distinguish dates from other months
                    "' href='#' aria-current='" + ( printDate.getTime() === currentDate.getTime() ? "true" : "false" ) + // mark date as selected for screen reader
                    "' data-date='" + printDate.getDate() + // store date as data
                    "'>" + printDate.getDate() + "</a>" ) ) + "</td>"; // display selectable date
              printDate.setDate( printDate.getDate() + 1 );
              printDate = this._daylightSavingAdjust( printDate );
            }
            calender += tbody + "</tr>";
          }
          drawMonth++;
          if ( drawMonth > 11 ) {
            drawMonth = 0;
            drawYear++;
          }
          calender += "</tbody></table>" + ( isMultiMonth ? "</div>" +
            ( ( numMonths[ 0 ] > 0 && col === numMonths[ 1 ] - 1 ) ? "<div class='ui-datepicker-row-break'></div>" : "" ) : "" );
          group += calender;
        }
        html += group;
      }
      html += buttonPanel;
      inst._keyEvent = false;
      return html;
    },

    /* Generate the month and year header. */
    _generateMonthYearHeader: function( inst, drawMonth, drawYear, minDate, maxDate,
                                        secondary, monthNames, monthNamesShort ) {

      var inMinYear, inMaxYear, month, years, thisYear, determineYear, year, endYear,
        changeMonth = this._get( inst, "changeMonth" ),
        changeYear = this._get( inst, "changeYear" ),
        showMonthAfterYear = this._get( inst, "showMonthAfterYear" ),
        selectMonthLabel = this._get( inst, "selectMonthLabel" ),
        selectYearLabel = this._get( inst, "selectYearLabel" ),
        html = "<div class='ui-datepicker-title'>",
        monthHtml = "";

      // Month selection
      if ( secondary || !changeMonth ) {
        monthHtml += "<span class='ui-datepicker-month'>" + monthNames[ drawMonth ] + "</span>";
      } else {
        inMinYear = ( minDate && minDate.getFullYear() === drawYear );
        inMaxYear = ( maxDate && maxDate.getFullYear() === drawYear );
        monthHtml += "<select class='ui-datepicker-month' aria-label='" + selectMonthLabel + "' data-handler='selectMonth' data-event='change'>";
        for ( month = 0; month < 12; month++ ) {
          if ( ( !inMinYear || month >= minDate.getMonth() ) && ( !inMaxYear || month <= maxDate.getMonth() ) ) {
            monthHtml += "<option value='" + month + "'" +
              ( month === drawMonth ? " selected='selected'" : "" ) +
              ">" + monthNamesShort[ month ] + "</option>";
          }
        }
        monthHtml += "</select>";
      }

      if ( !showMonthAfterYear ) {
        html += monthHtml + ( secondary || !( changeMonth && changeYear ) ? "&#xa0;" : "" );
      }

      // Year selection
      if ( !inst.yearshtml ) {
        inst.yearshtml = "";
        if ( secondary || !changeYear ) {
          html += "<span class='ui-datepicker-year'>" + drawYear + "</span>";
        } else {

          // determine range of years to display
          years = this._get( inst, "yearRange" ).split( ":" );
          thisYear = new Date().getFullYear();
          determineYear = function( value ) {
            var year = ( value.match( /c[+\-].*/ ) ? drawYear + parseInt( value.substring( 1 ), 10 ) :
              ( value.match( /[+\-].*/ ) ? thisYear + parseInt( value, 10 ) :
                parseInt( value, 10 ) ) );
            return ( isNaN( year ) ? thisYear : year );
          };
          year = determineYear( years[ 0 ] );
          endYear = Math.max( year, determineYear( years[ 1 ] || "" ) );
          year = ( minDate ? Math.max( year, minDate.getFullYear() ) : year );
          endYear = ( maxDate ? Math.min( endYear, maxDate.getFullYear() ) : endYear );
          inst.yearshtml += "<select class='ui-datepicker-year' aria-label='" + selectYearLabel + "' data-handler='selectYear' data-event='change'>";
          for ( ; year <= endYear; year++ ) {
            inst.yearshtml += "<option value='" + year + "'" +
              ( year === drawYear ? " selected='selected'" : "" ) +
              ">" + year + "</option>";
          }
          inst.yearshtml += "</select>";

          html += inst.yearshtml;
          inst.yearshtml = null;
        }
      }

      html += this._get( inst, "yearSuffix" );
      if ( showMonthAfterYear ) {
        html += ( secondary || !( changeMonth && changeYear ) ? "&#xa0;" : "" ) + monthHtml;
      }
      html += "</div>"; // Close datepicker_header
      return html;
    },

    /* Adjust one of the date sub-fields. */
    _adjustInstDate: function( inst, offset, period ) {
      var year = inst.selectedYear + ( period === "Y" ? offset : 0 ),
        month = inst.selectedMonth + ( period === "M" ? offset : 0 ),
        day = Math.min( inst.selectedDay, this._getDaysInMonth( year, month ) ) + ( period === "D" ? offset : 0 ),
        date = this._restrictMinMax( inst, this._daylightSavingAdjust( new Date( year, month, day ) ) );

      inst.selectedDay = date.getDate();
      inst.drawMonth = inst.selectedMonth = date.getMonth();
      inst.drawYear = inst.selectedYear = date.getFullYear();
      if ( period === "M" || period === "Y" ) {
        this._notifyChange( inst );
      }
    },

    /* Ensure a date is within any min/max bounds. */
    _restrictMinMax: function( inst, date ) {
      var minDate = this._getMinMaxDate( inst, "min" ),
        maxDate = this._getMinMaxDate( inst, "max" ),
        newDate = ( minDate && date < minDate ? minDate : date );
      return ( maxDate && newDate > maxDate ? maxDate : newDate );
    },

    /* Notify change of month/year. */
    _notifyChange: function( inst ) {
      var onChange = this._get( inst, "onChangeMonthYear" );
      if ( onChange ) {
        onChange.apply( ( inst.input ? inst.input[ 0 ] : null ),
          [ inst.selectedYear, inst.selectedMonth + 1, inst ] );
      }
    },

    /* Determine the number of months to show. */
    _getNumberOfMonths: function( inst ) {
      var numMonths = this._get( inst, "numberOfMonths" );
      return ( numMonths == null ? [ 1, 1 ] : ( typeof numMonths === "number" ? [ 1, numMonths ] : numMonths ) );
    },

    /* Determine the current maximum date - ensure no time components are set. */
    _getMinMaxDate: function( inst, minMax ) {
      return this._determineDate( inst, this._get( inst, minMax + "Date" ), null );
    },

    /* Find the number of days in a given month. */
    _getDaysInMonth: function( year, month ) {
      return 32 - this._daylightSavingAdjust( new Date( year, month, 32 ) ).getDate();
    },

    /* Find the day of the week of the first of a month. */
    _getFirstDayOfMonth: function( year, month ) {
      return new Date( year, month, 1 ).getDay();
    },

    /* Determines if we should allow a "next/prev" month display change. */
    _canAdjustMonth: function( inst, offset, curYear, curMonth ) {
      var numMonths = this._getNumberOfMonths( inst ),
        date = this._daylightSavingAdjust( new Date( curYear,
          curMonth + ( offset < 0 ? offset : numMonths[ 0 ] * numMonths[ 1 ] ), 1 ) );

      if ( offset < 0 ) {
        date.setDate( this._getDaysInMonth( date.getFullYear(), date.getMonth() ) );
      }
      return this._isInRange( inst, date );
    },

    /* Is the given date in the accepted range? */
    _isInRange: function( inst, date ) {
      var yearSplit, currentYear,
        minDate = this._getMinMaxDate( inst, "min" ),
        maxDate = this._getMinMaxDate( inst, "max" ),
        minYear = null,
        maxYear = null,
        years = this._get( inst, "yearRange" );
      if ( years ) {
        yearSplit = years.split( ":" );
        currentYear = new Date().getFullYear();
        minYear = parseInt( yearSplit[ 0 ], 10 );
        maxYear = parseInt( yearSplit[ 1 ], 10 );
        if ( yearSplit[ 0 ].match( /[+\-].*/ ) ) {
          minYear += currentYear;
        }
        if ( yearSplit[ 1 ].match( /[+\-].*/ ) ) {
          maxYear += currentYear;
        }
      }

      return ( ( !minDate || date.getTime() >= minDate.getTime() ) &&
        ( !maxDate || date.getTime() <= maxDate.getTime() ) &&
        ( !minYear || date.getFullYear() >= minYear ) &&
        ( !maxYear || date.getFullYear() <= maxYear ) );
    },

    /* Provide the configuration settings for formatting/parsing. */
    _getFormatConfig: function( inst ) {
      var shortYearCutoff = this._get( inst, "shortYearCutoff" );
      shortYearCutoff = ( typeof shortYearCutoff !== "string" ? shortYearCutoff :
        new Date().getFullYear() % 100 + parseInt( shortYearCutoff, 10 ) );
      return { shortYearCutoff: shortYearCutoff,
        dayNamesShort: this._get( inst, "dayNamesShort" ), dayNames: this._get( inst, "dayNames" ),
        monthNamesShort: this._get( inst, "monthNamesShort" ), monthNames: this._get( inst, "monthNames" ) };
    },

    /* Format the given date for display. */
    _formatDate: function( inst, day, month, year ) {
      if ( !day ) {
        inst.currentDay = inst.selectedDay;
        inst.currentMonth = inst.selectedMonth;
        inst.currentYear = inst.selectedYear;
      }
      var date = ( day ? ( typeof day === "object" ? day :
          this._daylightSavingAdjust( new Date( year, month, day ) ) ) :
        this._daylightSavingAdjust( new Date( inst.currentYear, inst.currentMonth, inst.currentDay ) ) );
      return this.formatDate( this._get( inst, "dateFormat" ), date, this._getFormatConfig( inst ) );
    }
  } );

  /*
 * Bind hover events for datepicker elements.
 * Done via delegate so the binding only occurs once in the lifetime of the parent div.
 * Global datepicker_instActive, set by _updateDatepicker allows the handlers to find their way back to the active picker.
 */
  function datepicker_bindHover( dpDiv ) {
    var selector = "button, .ui-datepicker-prev, .ui-datepicker-next, .ui-datepicker-calendar td a";
    return dpDiv.on( "mouseout", selector, function() {
      $( this ).removeClass( "ui-state-hover" );
      if ( this.className.indexOf( "ui-datepicker-prev" ) !== -1 ) {
        $( this ).removeClass( "ui-datepicker-prev-hover" );
      }
      if ( this.className.indexOf( "ui-datepicker-next" ) !== -1 ) {
        $( this ).removeClass( "ui-datepicker-next-hover" );
      }
    } )
      .on( "mouseover", selector, datepicker_handleMouseover );
  }

  function datepicker_handleMouseover() {
    if ( !$.datepicker._isDisabledDatepicker( datepicker_instActive.inline ? datepicker_instActive.dpDiv.parent()[ 0 ] : datepicker_instActive.input[ 0 ] ) ) {
      $( this ).parents( ".ui-datepicker-calendar" ).find( "a" ).removeClass( "ui-state-hover" );
      $( this ).addClass( "ui-state-hover" );
      if ( this.className.indexOf( "ui-datepicker-prev" ) !== -1 ) {
        $( this ).addClass( "ui-datepicker-prev-hover" );
      }
      if ( this.className.indexOf( "ui-datepicker-next" ) !== -1 ) {
        $( this ).addClass( "ui-datepicker-next-hover" );
      }
    }
  }

  /* jQuery extend now ignores nulls! */
  function datepicker_extendRemove( target, props ) {
    $.extend( target, props );
    for ( var name in props ) {
      if ( props[ name ] == null ) {
        target[ name ] = props[ name ];
      }
    }
    return target;
  }

  /* Invoke the datepicker functionality.
   @param  options  string - a command, optionally followed by additional parameters or
					Object - settings for attaching new datepicker functionality
   @return  jQuery object */
  $.fn.datepicker = function( options ) {

    /* Verify an empty collection wasn't passed - Fixes #6976 */
    if ( !this.length ) {
      return this;
    }

    /* Initialise the date picker. */
    if ( !$.datepicker.initialized ) {
      $( document ).on( "mousedown", $.datepicker._checkExternalClick );
      $.datepicker.initialized = true;
    }

    /* Append datepicker main container to body if not exist. */
    if ( $( "#" + $.datepicker._mainDivId ).length === 0 ) {
      $( "body" ).append( $.datepicker.dpDiv );
    }

    var otherArgs = Array.prototype.slice.call( arguments, 1 );
    if ( typeof options === "string" && ( options === "isDisabled" || options === "getDate" || options === "widget" ) ) {
      return $.datepicker[ "_" + options + "Datepicker" ].
      apply( $.datepicker, [ this[ 0 ] ].concat( otherArgs ) );
    }
    if ( options === "option" && arguments.length === 2 && typeof arguments[ 1 ] === "string" ) {
      return $.datepicker[ "_" + options + "Datepicker" ].
      apply( $.datepicker, [ this[ 0 ] ].concat( otherArgs ) );
    }
    return this.each( function() {
      if ( typeof options === "string" ) {
        $.datepicker[ "_" + options + "Datepicker" ]
          .apply( $.datepicker, [ this ].concat( otherArgs ) );
      } else {
        $.datepicker._attachDatepicker( this, options );
      }
    } );
  };

  $.datepicker = new Datepicker(); // singleton instance
  $.datepicker.initialized = false;
  $.datepicker.uuid = new Date().getTime();
  $.datepicker.version = "1.13.2";

  var widgetsDatepicker = $.datepicker;


  /*!
 * jQuery UI Slider 1.13.2
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Slider
//>>group: Widgets
//>>description: Displays a flexible slider with ranges and accessibility via keyboard.
//>>docs: http://api.jqueryui.com/slider/
//>>demos: http://jqueryui.com/slider/
//>>css.structure: ../../themes/base/core.css
//>>css.structure: ../../themes/base/slider.css
//>>css.theme: ../../themes/base/theme.css


  var widgetsSlider = $.widget( "ui.slider", $.ui.mouse, {
    version: "1.13.2",
    widgetEventPrefix: "slide",

    options: {
      animate: false,
      classes: {
        "ui-slider": "ui-corner-all",
        "ui-slider-handle": "ui-corner-all",

        // Note: ui-widget-header isn't the most fittingly semantic framework class for this
        // element, but worked best visually with a variety of themes
        "ui-slider-range": "ui-corner-all ui-widget-header"
      },
      distance: 0,
      max: 100,
      min: 0,
      orientation: "horizontal",
      range: false,
      step: 1,
      value: 0,
      values: null,

      // Callbacks
      change: null,
      slide: null,
      start: null,
      stop: null
    },

    // Number of pages in a slider
    // (how many times can you page up/down to go through the whole range)
    numPages: 5,

    _create: function() {
      this._keySliding = false;
      this._mouseSliding = false;
      this._animateOff = true;
      this._handleIndex = null;
      this._detectOrientation();
      this._mouseInit();
      this._calculateNewMax();

      this._addClass( "ui-slider ui-slider-" + this.orientation,
        "ui-widget ui-widget-content" );

      this._refresh();

      this._animateOff = false;
    },

    _refresh: function() {
      this._createRange();
      this._createHandles();
      this._setupEvents();
      this._refreshValue();
    },

    _createHandles: function() {
      var i, handleCount,
        options = this.options,
        existingHandles = this.element.find( ".ui-slider-handle" ),
        handle = "<span tabindex='0'></span>",
        handles = [];

      handleCount = ( options.values && options.values.length ) || 1;

      if ( existingHandles.length > handleCount ) {
        existingHandles.slice( handleCount ).remove();
        existingHandles = existingHandles.slice( 0, handleCount );
      }

      for ( i = existingHandles.length; i < handleCount; i++ ) {
        handles.push( handle );
      }

      this.handles = existingHandles.add( $( handles.join( "" ) ).appendTo( this.element ) );

      this._addClass( this.handles, "ui-slider-handle", "ui-state-default" );

      this.handle = this.handles.eq( 0 );

      this.handles.each( function( i ) {
        $( this )
          .data( "ui-slider-handle-index", i )
          .attr( "tabIndex", 0 );
      } );
    },

    _createRange: function() {
      var options = this.options;

      if ( options.range ) {
        if ( options.range === true ) {
          if ( !options.values ) {
            options.values = [ this._valueMin(), this._valueMin() ];
          } else if ( options.values.length && options.values.length !== 2 ) {
            options.values = [ options.values[ 0 ], options.values[ 0 ] ];
          } else if ( Array.isArray( options.values ) ) {
            options.values = options.values.slice( 0 );
          }
        }

        if ( !this.range || !this.range.length ) {
          this.range = $( "<div>" )
            .appendTo( this.element );

          this._addClass( this.range, "ui-slider-range" );
        } else {
          this._removeClass( this.range, "ui-slider-range-min ui-slider-range-max" );

          // Handle range switching from true to min/max
          this.range.css( {
            "left": "",
            "bottom": ""
          } );
        }
        if ( options.range === "min" || options.range === "max" ) {
          this._addClass( this.range, "ui-slider-range-" + options.range );
        }
      } else {
        if ( this.range ) {
          this.range.remove();
        }
        this.range = null;
      }
    },

    _setupEvents: function() {
      this._off( this.handles );
      this._on( this.handles, this._handleEvents );
      this._hoverable( this.handles );
      this._focusable( this.handles );
    },

    _destroy: function() {
      this.handles.remove();
      if ( this.range ) {
        this.range.remove();
      }

      this._mouseDestroy();
    },

    _mouseCapture: function( event ) {
      var position, normValue, distance, closestHandle, index, allowed, offset, mouseOverHandle,
        that = this,
        o = this.options;

      if ( o.disabled ) {
        return false;
      }

      this.elementSize = {
        width: this.element.outerWidth(),
        height: this.element.outerHeight()
      };
      this.elementOffset = this.element.offset();

      position = { x: event.pageX, y: event.pageY };
      normValue = this._normValueFromMouse( position );
      distance = this._valueMax() - this._valueMin() + 1;
      this.handles.each( function( i ) {
        var thisDistance = Math.abs( normValue - that.values( i ) );
        if ( ( distance > thisDistance ) ||
          ( distance === thisDistance &&
            ( i === that._lastChangedValue || that.values( i ) === o.min ) ) ) {
          distance = thisDistance;
          closestHandle = $( this );
          index = i;
        }
      } );

      allowed = this._start( event, index );
      if ( allowed === false ) {
        return false;
      }
      this._mouseSliding = true;

      this._handleIndex = index;

      this._addClass( closestHandle, null, "ui-state-active" );
      closestHandle.trigger( "focus" );

      offset = closestHandle.offset();
      mouseOverHandle = !$( event.target ).parents().addBack().is( ".ui-slider-handle" );
      this._clickOffset = mouseOverHandle ? { left: 0, top: 0 } : {
        left: event.pageX - offset.left - ( closestHandle.width() / 2 ),
        top: event.pageY - offset.top -
          ( closestHandle.height() / 2 ) -
          ( parseInt( closestHandle.css( "borderTopWidth" ), 10 ) || 0 ) -
          ( parseInt( closestHandle.css( "borderBottomWidth" ), 10 ) || 0 ) +
          ( parseInt( closestHandle.css( "marginTop" ), 10 ) || 0 )
      };

      if ( !this.handles.hasClass( "ui-state-hover" ) ) {
        this._slide( event, index, normValue );
      }
      this._animateOff = true;
      return true;
    },

    _mouseStart: function() {
      return true;
    },

    _mouseDrag: function( event ) {
      var position = { x: event.pageX, y: event.pageY },
        normValue = this._normValueFromMouse( position );

      this._slide( event, this._handleIndex, normValue );

      return false;
    },

    _mouseStop: function( event ) {
      this._removeClass( this.handles, null, "ui-state-active" );
      this._mouseSliding = false;

      this._stop( event, this._handleIndex );
      this._change( event, this._handleIndex );

      this._handleIndex = null;
      this._clickOffset = null;
      this._animateOff = false;

      return false;
    },

    _detectOrientation: function() {
      this.orientation = ( this.options.orientation === "vertical" ) ? "vertical" : "horizontal";
    },

    _normValueFromMouse: function( position ) {
      var pixelTotal,
        pixelMouse,
        percentMouse,
        valueTotal,
        valueMouse;

      if ( this.orientation === "horizontal" ) {
        pixelTotal = this.elementSize.width;
        pixelMouse = position.x - this.elementOffset.left -
          ( this._clickOffset ? this._clickOffset.left : 0 );
      } else {
        pixelTotal = this.elementSize.height;
        pixelMouse = position.y - this.elementOffset.top -
          ( this._clickOffset ? this._clickOffset.top : 0 );
      }

      percentMouse = ( pixelMouse / pixelTotal );
      if ( percentMouse > 1 ) {
        percentMouse = 1;
      }
      if ( percentMouse < 0 ) {
        percentMouse = 0;
      }
      if ( this.orientation === "vertical" ) {
        percentMouse = 1 - percentMouse;
      }

      valueTotal = this._valueMax() - this._valueMin();
      valueMouse = this._valueMin() + percentMouse * valueTotal;

      return this._trimAlignValue( valueMouse );
    },

    _uiHash: function( index, value, values ) {
      var uiHash = {
        handle: this.handles[ index ],
        handleIndex: index,
        value: value !== undefined ? value : this.value()
      };

      if ( this._hasMultipleValues() ) {
        uiHash.value = value !== undefined ? value : this.values( index );
        uiHash.values = values || this.values();
      }

      return uiHash;
    },

    _hasMultipleValues: function() {
      return this.options.values && this.options.values.length;
    },

    _start: function( event, index ) {
      return this._trigger( "start", event, this._uiHash( index ) );
    },

    _slide: function( event, index, newVal ) {
      var allowed, otherVal,
        currentValue = this.value(),
        newValues = this.values();

      if ( this._hasMultipleValues() ) {
        otherVal = this.values( index ? 0 : 1 );
        currentValue = this.values( index );

        if ( this.options.values.length === 2 && this.options.range === true ) {
          newVal =  index === 0 ? Math.min( otherVal, newVal ) : Math.max( otherVal, newVal );
        }

        newValues[ index ] = newVal;
      }

      if ( newVal === currentValue ) {
        return;
      }

      allowed = this._trigger( "slide", event, this._uiHash( index, newVal, newValues ) );

      // A slide can be canceled by returning false from the slide callback
      if ( allowed === false ) {
        return;
      }

      if ( this._hasMultipleValues() ) {
        this.values( index, newVal );
      } else {
        this.value( newVal );
      }
    },

    _stop: function( event, index ) {
      this._trigger( "stop", event, this._uiHash( index ) );
    },

    _change: function( event, index ) {
      if ( !this._keySliding && !this._mouseSliding ) {

        //store the last changed value index for reference when handles overlap
        this._lastChangedValue = index;
        this._trigger( "change", event, this._uiHash( index ) );
      }
    },

    value: function( newValue ) {
      if ( arguments.length ) {
        this.options.value = this._trimAlignValue( newValue );
        this._refreshValue();
        this._change( null, 0 );
        return;
      }

      return this._value();
    },

    values: function( index, newValue ) {
      var vals,
        newValues,
        i;

      if ( arguments.length > 1 ) {
        this.options.values[ index ] = this._trimAlignValue( newValue );
        this._refreshValue();
        this._change( null, index );
        return;
      }

      if ( arguments.length ) {
        if ( Array.isArray( arguments[ 0 ] ) ) {
          vals = this.options.values;
          newValues = arguments[ 0 ];
          for ( i = 0; i < vals.length; i += 1 ) {
            vals[ i ] = this._trimAlignValue( newValues[ i ] );
            this._change( null, i );
          }
          this._refreshValue();
        } else {
          if ( this._hasMultipleValues() ) {
            return this._values( index );
          } else {
            return this.value();
          }
        }
      } else {
        return this._values();
      }
    },

    _setOption: function( key, value ) {
      var i,
        valsLength = 0;

      if ( key === "range" && this.options.range === true ) {
        if ( value === "min" ) {
          this.options.value = this._values( 0 );
          this.options.values = null;
        } else if ( value === "max" ) {
          this.options.value = this._values( this.options.values.length - 1 );
          this.options.values = null;
        }
      }

      if ( Array.isArray( this.options.values ) ) {
        valsLength = this.options.values.length;
      }

      this._super( key, value );

      switch ( key ) {
        case "orientation":
          this._detectOrientation();
          this._removeClass( "ui-slider-horizontal ui-slider-vertical" )
            ._addClass( "ui-slider-" + this.orientation );
          this._refreshValue();
          if ( this.options.range ) {
            this._refreshRange( value );
          }

          // Reset positioning from previous orientation
          this.handles.css( value === "horizontal" ? "bottom" : "left", "" );
          break;
        case "value":
          this._animateOff = true;
          this._refreshValue();
          this._change( null, 0 );
          this._animateOff = false;
          break;
        case "values":
          this._animateOff = true;
          this._refreshValue();

          // Start from the last handle to prevent unreachable handles (#9046)
          for ( i = valsLength - 1; i >= 0; i-- ) {
            this._change( null, i );
          }
          this._animateOff = false;
          break;
        case "step":
        case "min":
        case "max":
          this._animateOff = true;
          this._calculateNewMax();
          this._refreshValue();
          this._animateOff = false;
          break;
        case "range":
          this._animateOff = true;
          this._refresh();
          this._animateOff = false;
          break;
      }
    },

    _setOptionDisabled: function( value ) {
      this._super( value );

      this._toggleClass( null, "ui-state-disabled", !!value );
    },

    //internal value getter
    // _value() returns value trimmed by min and max, aligned by step
    _value: function() {
      var val = this.options.value;
      val = this._trimAlignValue( val );

      return val;
    },

    //internal values getter
    // _values() returns array of values trimmed by min and max, aligned by step
    // _values( index ) returns single value trimmed by min and max, aligned by step
    _values: function( index ) {
      var val,
        vals,
        i;

      if ( arguments.length ) {
        val = this.options.values[ index ];
        val = this._trimAlignValue( val );

        return val;
      } else if ( this._hasMultipleValues() ) {

        // .slice() creates a copy of the array
        // this copy gets trimmed by min and max and then returned
        vals = this.options.values.slice();
        for ( i = 0; i < vals.length; i += 1 ) {
          vals[ i ] = this._trimAlignValue( vals[ i ] );
        }

        return vals;
      } else {
        return [];
      }
    },

    // Returns the step-aligned value that val is closest to, between (inclusive) min and max
    _trimAlignValue: function( val ) {
      if ( val <= this._valueMin() ) {
        return this._valueMin();
      }
      if ( val >= this._valueMax() ) {
        return this._valueMax();
      }
      var step = ( this.options.step > 0 ) ? this.options.step : 1,
        valModStep = ( val - this._valueMin() ) % step,
        alignValue = val - valModStep;

      if ( Math.abs( valModStep ) * 2 >= step ) {
        alignValue += ( valModStep > 0 ) ? step : ( -step );
      }

      // Since JavaScript has problems with large floats, round
      // the final value to 5 digits after the decimal point (see #4124)
      return parseFloat( alignValue.toFixed( 5 ) );
    },

    _calculateNewMax: function() {
      var max = this.options.max,
        min = this._valueMin(),
        step = this.options.step,
        aboveMin = Math.round( ( max - min ) / step ) * step;
      max = aboveMin + min;
      if ( max > this.options.max ) {

        //If max is not divisible by step, rounding off may increase its value
        max -= step;
      }
      this.max = parseFloat( max.toFixed( this._precision() ) );
    },

    _precision: function() {
      var precision = this._precisionOf( this.options.step );
      if ( this.options.min !== null ) {
        precision = Math.max( precision, this._precisionOf( this.options.min ) );
      }
      return precision;
    },

    _precisionOf: function( num ) {
      var str = num.toString(),
        decimal = str.indexOf( "." );
      return decimal === -1 ? 0 : str.length - decimal - 1;
    },

    _valueMin: function() {
      return this.options.min;
    },

    _valueMax: function() {
      return this.max;
    },

    _refreshRange: function( orientation ) {
      if ( orientation === "vertical" ) {
        this.range.css( { "width": "", "left": "" } );
      }
      if ( orientation === "horizontal" ) {
        this.range.css( { "height": "", "bottom": "" } );
      }
    },

    _refreshValue: function() {
      var lastValPercent, valPercent, value, valueMin, valueMax,
        oRange = this.options.range,
        o = this.options,
        that = this,
        animate = ( !this._animateOff ) ? o.animate : false,
        _set = {};

      if ( this._hasMultipleValues() ) {
        this.handles.each( function( i ) {
          valPercent = ( that.values( i ) - that._valueMin() ) / ( that._valueMax() -
            that._valueMin() ) * 100;
          _set[ that.orientation === "horizontal" ? "left" : "bottom" ] = valPercent + "%";
          $( this ).stop( 1, 1 )[ animate ? "animate" : "css" ]( _set, o.animate );
          if ( that.options.range === true ) {
            if ( that.orientation === "horizontal" ) {
              if ( i === 0 ) {
                that.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( {
                  left: valPercent + "%"
                }, o.animate );
              }
              if ( i === 1 ) {
                that.range[ animate ? "animate" : "css" ]( {
                  width: ( valPercent - lastValPercent ) + "%"
                }, {
                  queue: false,
                  duration: o.animate
                } );
              }
            } else {
              if ( i === 0 ) {
                that.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( {
                  bottom: ( valPercent ) + "%"
                }, o.animate );
              }
              if ( i === 1 ) {
                that.range[ animate ? "animate" : "css" ]( {
                  height: ( valPercent - lastValPercent ) + "%"
                }, {
                  queue: false,
                  duration: o.animate
                } );
              }
            }
          }
          lastValPercent = valPercent;
        } );
      } else {
        value = this.value();
        valueMin = this._valueMin();
        valueMax = this._valueMax();
        valPercent = ( valueMax !== valueMin ) ?
          ( value - valueMin ) / ( valueMax - valueMin ) * 100 :
          0;
        _set[ this.orientation === "horizontal" ? "left" : "bottom" ] = valPercent + "%";
        this.handle.stop( 1, 1 )[ animate ? "animate" : "css" ]( _set, o.animate );

        if ( oRange === "min" && this.orientation === "horizontal" ) {
          this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( {
            width: valPercent + "%"
          }, o.animate );
        }
        if ( oRange === "max" && this.orientation === "horizontal" ) {
          this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( {
            width: ( 100 - valPercent ) + "%"
          }, o.animate );
        }
        if ( oRange === "min" && this.orientation === "vertical" ) {
          this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( {
            height: valPercent + "%"
          }, o.animate );
        }
        if ( oRange === "max" && this.orientation === "vertical" ) {
          this.range.stop( 1, 1 )[ animate ? "animate" : "css" ]( {
            height: ( 100 - valPercent ) + "%"
          }, o.animate );
        }
      }
    },

    _handleEvents: {
      keydown: function( event ) {
        var allowed, curVal, newVal, step,
          index = $( event.target ).data( "ui-slider-handle-index" );

        switch ( event.keyCode ) {
          case $.ui.keyCode.HOME:
          case $.ui.keyCode.END:
          case $.ui.keyCode.PAGE_UP:
          case $.ui.keyCode.PAGE_DOWN:
          case $.ui.keyCode.UP:
          case $.ui.keyCode.RIGHT:
          case $.ui.keyCode.DOWN:
          case $.ui.keyCode.LEFT:
            event.preventDefault();
            if ( !this._keySliding ) {
              this._keySliding = true;
              this._addClass( $( event.target ), null, "ui-state-active" );
              allowed = this._start( event, index );
              if ( allowed === false ) {
                return;
              }
            }
            break;
        }

        step = this.options.step;
        if ( this._hasMultipleValues() ) {
          curVal = newVal = this.values( index );
        } else {
          curVal = newVal = this.value();
        }

        switch ( event.keyCode ) {
          case $.ui.keyCode.HOME:
            newVal = this._valueMin();
            break;
          case $.ui.keyCode.END:
            newVal = this._valueMax();
            break;
          case $.ui.keyCode.PAGE_UP:
            newVal = this._trimAlignValue(
              curVal + ( ( this._valueMax() - this._valueMin() ) / this.numPages )
            );
            break;
          case $.ui.keyCode.PAGE_DOWN:
            newVal = this._trimAlignValue(
              curVal - ( ( this._valueMax() - this._valueMin() ) / this.numPages ) );
            break;
          case $.ui.keyCode.UP:
          case $.ui.keyCode.RIGHT:
            if ( curVal === this._valueMax() ) {
              return;
            }
            newVal = this._trimAlignValue( curVal + step );
            break;
          case $.ui.keyCode.DOWN:
          case $.ui.keyCode.LEFT:
            if ( curVal === this._valueMin() ) {
              return;
            }
            newVal = this._trimAlignValue( curVal - step );
            break;
        }

        this._slide( event, index, newVal );
      },
      keyup: function( event ) {
        var index = $( event.target ).data( "ui-slider-handle-index" );

        if ( this._keySliding ) {
          this._keySliding = false;
          this._stop( event, index );
          this._change( event, index );
          this._removeClass( $( event.target ), null, "ui-state-active" );
        }
      }
    }
  } );




} );
