wp/wp-includes/js/jquery/ui/datepicker.js
changeset 18 be944660c56a
child 19 3d72ae0968f4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/js/jquery/ui/datepicker.js	Wed Sep 21 18:19:35 2022 +0200
@@ -0,0 +1,2119 @@
+// jscs:disable maximumLineLength
+/* jscs:disable requireCamelCaseOrUpperCaseIdentifiers */
+/*!
+ * jQuery UI Datepicker 1.12.1
+ * 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
+
+( function( factory ) {
+	if ( typeof define === "function" && define.amd ) {
+
+		// AMD. Register as an anonymous module.
+		define( [
+			"jquery",
+			"./core"
+		], factory );
+	} else {
+
+		// Browser globals
+		factory( jQuery );
+	}
+}( function( $ ) {
+
+$.extend( $.ui, { datepicker: { version: "1.12.1" } } );
+
+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
+	};
+	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
+		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 class='" + this._appendClass + "'>" + appendText + "</span>" );
+			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" );
+			inst.trigger = $( this._get( inst, "buttonImageOnly" ) ?
+				$( "<img/>" ).addClass( this._triggerClass ).
+					attr( { src: buttonImage, alt: buttonText, title: buttonText } ) :
+				$( "<button type='button'></button>" ).addClass( this._triggerClass ).
+					html( !buttonImage ? buttonText : $( "<img/>" ).attr(
+					{ src:buttonImage, alt:buttonText, title: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;
+		}
+	},
+
+	/* 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,
+			function( value ) { return ( value === target ? null : value ); } ); // delete entry
+	},
+
+	/* 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,
+			function( value ) { return ( value === target ? null : value ); } ); // delete entry
+		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" );
+
+		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 );
+		}
+	},
+
+	// #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.filters.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 === "M" ? this._get( inst, "showCurrentAtPos" ) : 0 ), // undo positioning
+			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 = $( "a", td ).html();
+		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 ) );
+			$( 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 ) ) );
+
+		prev = ( this._canAdjustMonth( inst, -1, drawYear, drawMonth ) ?
+			"<a class='ui-datepicker-prev ui-corner-all' data-handler='prev' data-event='click'" +
+			" title='" + prevText + "'><span class='ui-icon ui-icon-circle-triangle-" + ( isRTL ? "e" : "w" ) + "'>" + prevText + "</span></a>" :
+			( hideIfNoPrevNext ? "" : "<a class='ui-datepicker-prev ui-corner-all ui-state-disabled' title='" + prevText + "'><span class='ui-icon ui-icon-circle-triangle-" + ( isRTL ? "e" : "w" ) + "'>" + prevText + "</span></a>" ) );
+
+		nextText = this._get( inst, "nextText" );
+		nextText = ( !navigationAsDateFormat ? nextText : this.formatDate( nextText,
+			this._daylightSavingAdjust( new Date( drawYear, drawMonth + stepMonths, 1 ) ),
+			this._getFormatConfig( inst ) ) );
+
+		next = ( this._canAdjustMonth( inst, +1, drawYear, drawMonth ) ?
+			"<a class='ui-datepicker-next ui-corner-all' data-handler='next' data-event='click'" +
+			" title='" + nextText + "'><span class='ui-icon ui-icon-circle-triangle-" + ( isRTL ? "w" : "e" ) + "'>" + nextText + "</span></a>" :
+			( hideIfNoPrevNext ? "" : "<a class='ui-datepicker-next ui-corner-all ui-state-disabled' title='" + nextText + "'><span class='ui-icon ui-icon-circle-triangle-" + ( isRTL ? "w" : "e" ) + "'>" + nextText + "</span></a>" ) );
+
+		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 = ( !inst.inline ? "<button type='button' class='ui-datepicker-close ui-state-default ui-priority-primary ui-corner-all' data-handler='hide' data-event='click'>" +
+			this._get( inst, "closeText" ) + "</button>" : "" );
+
+		buttonPanel = ( showButtonPanel ) ? "<div class='ui-datepicker-buttonpane ui-widget-content'>" + ( isRTL ? controls : "" ) +
+			( this._isInRange( inst, gotoDate ) ? "<button type='button' class='ui-datepicker-current ui-state-default ui-priority-secondary ui-corner-all' data-handler='today' data-event='click'" +
+			">" + currentText + "</button>" : "" ) + ( isRTL ? "" : controls ) + "</div>" : "";
+
+		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='#'>" + 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" ),
+			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' 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' 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() {
+		typeof options === "string" ?
+			$.datepicker[ "_" + options + "Datepicker" ].
+				apply( $.datepicker, [ this ].concat( otherArgs ) ) :
+			$.datepicker._attachDatepicker( this, options );
+	} );
+};
+
+$.datepicker = new Datepicker(); // singleton instance
+$.datepicker.initialized = false;
+$.datepicker.uuid = new Date().getTime();
+$.datepicker.version = "1.12.1";
+
+return $.datepicker;
+
+} ) );