/www/ui/ui.datepicker.js

/*

 * jQuery UI Datepicker 1.7.1

 *

 * Copyright (c) 2009 AUTHORS.txt (http://jqueryui.com/about)

 * Dual licensed under the MIT (MIT-LICENSE.txt)

 * and GPL (GPL-LICENSE.txt) licenses.

 *

 * http://docs.jquery.com/UI/Datepicker

 *

 * Depends:

 *	ui.core.js

 */



(function($) { // hide the namespace



$.extend($.ui, { datepicker: { version: "1.7.1" } });



var PROP_NAME = 'datepicker';



/* 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.debug = false; // Change this to true to start debugging

	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

		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

	};

	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: 'show', // 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

		showMonthAfterYear: false, // True if the year select precedes month, false for month then year

		yearRange: '-10:+10', // Range of years to display in drop-down,

			// either relative to current year (-nn:+nn) or absolute (nnnn:nnnn)

		showOtherMonths: false, // True to show dates in other months, false to leave blank

		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: 'normal', // 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

	};

	$.extend(this._defaults, this.regional['']);

	this.dpDiv = $('<div id="' + this._mainDivId + '" class="ui-datepicker ui-widget ui-widget-content ui-helper-clearfix ui-corner-all ui-helper-hidden-accessible"></div>');

}



$.extend(Datepicker.prototype, {

	/* Class name added to elements to indicate already configured with a date picker. */

	markerClassName: 'hasDatepicker',



	/* Debug logging (if enabled). */

	log: function () {

		if (this.debug)

			console.log.apply('', arguments);

	},



	/* 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) {

		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) {

		// check for settings on the control itself - in namespace 'date:'

		var inlineSettings = null;

		for (var attrName in this._defaults) {

			var attrValue = target.getAttribute('date:' + attrName);

			if (attrValue) {

				inlineSettings = inlineSettings || {};

				try {

					inlineSettings[attrName] = eval(attrValue);

				} catch (err) {

					inlineSettings[attrName] = attrValue;

				}

			}

		}

		var nodeName = target.nodeName.toLowerCase();

		var inline = (nodeName == 'div' || nodeName == 'span');

		if (!target.id)

			target.id = 'dp' + (++this.uuid);

		var inst = this._newInst($(target), inline);

		inst.settings = $.extend({}, settings || {}, inlineSettings || {});

		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(/([:\[\]\.])/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

			$('<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.trigger = $([]);

		if (input.hasClass(this.markerClassName))

			return;

		var appendText = this._get(inst, 'appendText');

		var isRTL = this._get(inst, 'isRTL');

		if (appendText)

			input[isRTL ? 'before' : 'after']('<span class="' + this._appendClass + '">' + appendText + '</span>');

		var showOn = this._get(inst, 'showOn');

		if (showOn == 'focus' || showOn == 'both') // pop-up date picker when in the marked field

			input.focus(this._showDatepicker);

		if (showOn == 'button' || showOn == 'both') { // pop-up date picker when button clicked

			var buttonText = this._get(inst, 'buttonText');

			var 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.click(function() {

				if ($.datepicker._datepickerShowing && $.datepicker._lastInput == target)

					$.datepicker._hideDatepicker();

				else

					$.datepicker._showDatepicker(target);

				return false;

			});

		}

		input.addClass(this.markerClassName).keydown(this._doKeyDown).keypress(this._doKeyPress).

			bind("setData.datepicker", function(event, key, value) {

				inst.settings[key] = value;

			}).bind("getData.datepicker", function(event, key) {

				return this._get(inst, key);

			});

		$.data(target, PROP_NAME, inst);

	},



	/* 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).

			bind("setData.datepicker", function(event, key, value){

				inst.settings[key] = value;

			}).bind("getData.datepicker", function(event, key){

				return this._get(inst, key);

			});

		$.data(target, PROP_NAME, inst);

		this._setDate(inst, this._getDefaultDate(inst));

		this._updateDatepicker(inst);

		this._updateAlternate(inst);

	},



	/* Pop-up the date picker in a "dialog" box.

	   @param  input     element - ignored

	   @param  dateText  string - the initial date to display (in the current format)

	   @param  onSelect  function - the function(dateText) 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, dateText, onSelect, settings, pos) {

		var inst = this._dialogInst; // internal instance

		if (!inst) {

			var id = 'dp' + (++this.uuid);

			this._dialogInput = $('<input type="text" id="' + id +

				'" size="1" style="position: absolute; top: -100px;"/>');

			this._dialogInput.keydown(this._doKeyDown);

			$('body').append(this._dialogInput);

			inst = this._dialogInst = this._newInst(this._dialogInput, false);

			inst.settings = {};

			$.data(this._dialogInput[0], PROP_NAME, inst);

		}

		extendRemove(inst.settings, settings || {});

		this._dialogInput.val(dateText);



		this._pos = (pos ? (pos.length ? pos : [pos.pageX, pos.pageY]) : null);

		if (!this._pos) {

			var browserWidth = window.innerWidth || document.documentElement.clientWidth ||	document.body.clientWidth;

			var browserHeight = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;

			var scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;

			var 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] + '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], PROP_NAME, inst);

		return this;

	},



	/* Detach a datepicker from its control.

	   @param  target    element - the target input field or division or span */

	_destroyDatepicker: function(target) {

		var $target = $(target);

		var inst = $.data(target, PROP_NAME);

		if (!$target.hasClass(this.markerClassName)) {

			return;

		}

		var nodeName = target.nodeName.toLowerCase();

		$.removeData(target, PROP_NAME);

		if (nodeName == 'input') {

			inst.trigger.remove();

			$target.siblings('.' + this._appendClass).remove().end().

				removeClass(this.markerClassName).

				unbind('focus', this._showDatepicker).

				unbind('keydown', this._doKeyDown).

				unbind('keypress', this._doKeyPress);

		} else if (nodeName == 'div' || nodeName == 'span')

			$target.removeClass(this.markerClassName).empty();

	},



	/* Enable the date picker to a jQuery selection.

	   @param  target    element - the target input field or division or span */

	_enableDatepicker: function(target) {

		var $target = $(target);

		var inst = $.data(target, PROP_NAME);

		if (!$target.hasClass(this.markerClassName)) {

			return;

		}

		var 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') {

			var inline = $target.children('.' + this._inlineClass);

			inline.children().removeClass('ui-state-disabled');

		}

		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 $target = $(target);

		var inst = $.data(target, PROP_NAME);

		if (!$target.hasClass(this.markerClassName)) {

			return;

		}

		var 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') {

			var inline = $target.children('.' + this._inlineClass);

			inline.children().addClass('ui-state-disabled');

		}

		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, PROP_NAME);

		}

		catch (err) {

			throw 'Missing instance data for this datepicker';

		}

	},



	/* Update 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

	   @param  value   any - the new value for the setting (omit if above is an object) */

	_optionDatepicker: function(target, name, value) {

		var settings = name || {};

		if (typeof name == 'string') {

			settings = {};

			settings[name] = value;

		}

		var inst = this._getInst(target);

		if (inst) {

			if (this._curInst == inst) {

				this._hideDatepicker(null);

			}

			extendRemove(inst.settings, settings);

			var date = new Date();

			extendRemove(inst, {rangeStart: null, // start of range

				endDay: null, endMonth: null, endYear: null, // end of range

				selectedDay: date.getDate(), selectedMonth: date.getMonth(),

				selectedYear: date.getFullYear(), // starting point

				currentDay: date.getDate(), currentMonth: date.getMonth(),

				currentYear: date.getFullYear(), // current selection

				drawMonth: date.getMonth(), drawYear: date.getFullYear()}); // month being drawn

			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

	   @param  endDate  Date - the new end date for a range (optional) */

	_setDateDatepicker: function(target, date, endDate) {

		var inst = this._getInst(target);

		if (inst) {

			this._setDate(inst, date, endDate);

			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

	   @return Date - the current date or

	           Date[2] - the current dates for a range */

	_getDateDatepicker: function(target) {

		var inst = this._getInst(target);

		if (inst && !inst.inline)

			this._setDateFromField(inst);

		return (inst ? this._getDate(inst) : null);

	},



	/* Handle keystrokes. */

	_doKeyDown: function(event) {

		var inst = $.datepicker._getInst(event.target);

		var handled = true;

		var isRTL = inst.dpDiv.is('.ui-datepicker-rtl');

		inst._keyEvent = true;

		if ($.datepicker._datepickerShowing)

			switch (event.keyCode) {

				case 9:  $.datepicker._hideDatepicker(null, '');

						break; // hide on tab out

				case 13: var sel = $('td.' + $.datepicker._dayOverClass +

							', td.' + $.datepicker._currentClass, inst.dpDiv);

						if (sel[0])

							$.datepicker._selectDay(event.target, inst.selectedMonth, inst.selectedYear, sel[0]);

						else

							$.datepicker._hideDatepicker(null, $.datepicker._get(inst, 'duration'));

						return false; // don't submit the form

						break; // select the value on enter

				case 27: $.datepicker._hideDatepicker(null, $.datepicker._get(inst, 'duration'));

						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 inst = $.datepicker._getInst(event.target);

		if ($.datepicker._get(inst, 'constrainInput')) {

			var chars = $.datepicker._possibleChars($.datepicker._get(inst, 'dateFormat'));

			var chr = String.fromCharCode(event.charCode == undefined ? event.keyCode : event.charCode);

			return event.ctrlKey || (chr < ' ' || !chars || chars.indexOf(chr) > -1);

		}

	},



	/* Pop-up the date picker for a given input field.

	   @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 = $.datepicker._getInst(input);

		var beforeShow = $.datepicker._get(inst, 'beforeShow');

		extendRemove(inst.settings, (beforeShow ? beforeShow.apply(input, [input, inst]) : {}));

		$.datepicker._hideDatepicker(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

		}

		var isFixed = false;

		$(input).parents().each(function() {

			isFixed |= $(this).css('position') == 'fixed';

			return !isFixed;

		});

		if (isFixed && $.browser.opera) { // correction for Opera when fixed and scrolled

			$.datepicker._pos[0] -= document.documentElement.scrollLeft;

			$.datepicker._pos[1] -= document.documentElement.scrollTop;

		}

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

		$.datepicker._pos = null;

		inst.rangeStart = null;

		// 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) {

			var showAnim = $.datepicker._get(inst, 'showAnim') || 'show';

			var duration = $.datepicker._get(inst, 'duration');

			var postProcess = function() {

				$.datepicker._datepickerShowing = true;

				if ($.browser.msie && parseInt($.browser.version,10) < 7) // fix IE < 7 select problems

					$('iframe.ui-datepicker-cover').css({width: inst.dpDiv.width() + 4,

						height: inst.dpDiv.height() + 4});

			};

			if ($.effects && $.effects[showAnim])

				inst.dpDiv.show(showAnim, $.datepicker._get(inst, 'showOptions'), duration, postProcess);

			else

				inst.dpDiv[showAnim](duration, postProcess);

			if (duration == '')

				postProcess();

			if (inst.input[0].type != 'hidden')

				inst.input[0].focus();

			$.datepicker._curInst = inst;

		}

	},



	/* Generate the date picker content. */

	_updateDatepicker: function(inst) {

		var dims = {width: inst.dpDiv.width() + 4,

			height: inst.dpDiv.height() + 4};

		var self = this;

		inst.dpDiv.empty().append(this._generateHTML(inst))

			.find('iframe.ui-datepicker-cover').

				css({width: dims.width, height: dims.height})

			.end()

			.find('button, .ui-datepicker-prev, .ui-datepicker-next, .ui-datepicker-calendar td a')

				.bind('mouseout', 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');

				})

				.bind('mouseover', function(){

					if (!self._isDisabledDatepicker( inst.inline ? inst.dpDiv.parent()[0] : inst.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');

					}

				})

			.end()

			.find('.' + this._dayOverClass + ' a')

				.trigger('mouseover')

			.end();

		var numMonths = this._getNumberOfMonths(inst);

		var cols = numMonths[1];

		var width = 17;

		if (cols > 1) {

			inst.dpDiv.addClass('ui-datepicker-multi-' + cols).css('width', (width * cols) + 'em');

		} else {

			inst.dpDiv.removeClass('ui-datepicker-multi-2 ui-datepicker-multi-3 ui-datepicker-multi-4').width('');

		}

		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.input && inst.input[0].type != 'hidden' && inst == $.datepicker._curInst)

			$(inst.input[0]).focus();

	},



	/* Check positioning to remain on screen. */

	_checkOffset: function(inst, offset, isFixed) {

		var dpWidth = inst.dpDiv.outerWidth();

		var dpHeight = inst.dpDiv.outerHeight();

		var inputWidth = inst.input ? inst.input.outerWidth() : 0;

		var inputHeight = inst.input ? inst.input.outerHeight() : 0;

		var viewWidth = (window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth) + $(document).scrollLeft();

		var viewHeight = (window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight) + $(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 -= (offset.left + dpWidth > viewWidth && viewWidth > dpWidth) ? Math.abs(offset.left + dpWidth - viewWidth) : 0;

		offset.top -= (offset.top + dpHeight > viewHeight && viewHeight > dpHeight) ? Math.abs(offset.top + dpHeight + inputHeight*2 - viewHeight) : 0;



		return offset;

	},



	/* Find an object's position on the screen. */

	_findPos: function(obj) {

        while (obj && (obj.type == 'hidden' || obj.nodeType != 1)) {

            obj = obj.nextSibling;

        }

        var 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

	   @param  duration  string - the duration over which to close the date picker */

	_hideDatepicker: function(input, duration) {

		var inst = this._curInst;

		if (!inst || (input && inst != $.data(input, PROP_NAME)))

			return;

		if (inst.stayOpen)

			this._selectDate('#' + inst.id, this._formatDate(inst,

				inst.currentDay, inst.currentMonth, inst.currentYear));

		inst.stayOpen = false;

		if (this._datepickerShowing) {

			duration = (duration != null ? duration : this._get(inst, 'duration'));

			var showAnim = this._get(inst, 'showAnim');

			var postProcess = function() {

				$.datepicker._tidyDialog(inst);

			};

			if (duration != '' && $.effects && $.effects[showAnim])

				inst.dpDiv.hide(showAnim, $.datepicker._get(inst, 'showOptions'),

					duration, postProcess);

			else

				inst.dpDiv[(duration == '' ? 'hide' : (showAnim == 'slideDown' ? 'slideUp' :

					(showAnim == 'fadeIn' ? 'fadeOut' : 'hide')))](duration, postProcess);

			if (duration == '')

				this._tidyDialog(inst);

			var onClose = this._get(inst, 'onClose');

			if (onClose)

				onClose.apply((inst.input ? inst.input[0] : null),

					[(inst.input ? inst.input.val() : ''), inst]);  // trigger custom callback

			this._datepickerShowing = false;

			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;

		}

		this._curInst = null;

	},



	/* Tidy up after a dialog display. */

	_tidyDialog: function(inst) {

		inst.dpDiv.removeClass(this._dialogClass).unbind('.ui-datepicker-calendar');

	},



	/* Close date picker if clicked elsewhere. */

	_checkExternalClick: function(event) {

		if (!$.datepicker._curInst)

			return;

		var $target = $(event.target);

		if (($target.parents('#' + $.datepicker._mainDivId).length == 0) &&

				!$target.hasClass($.datepicker.markerClassName) &&

				!$target.hasClass($.datepicker._triggerClass) &&

				$.datepicker._datepickerShowing && !($.datepicker._inDialog && $.blockUI))

			$.datepicker._hideDatepicker(null, '');

	},



	/* Adjust one of the date sub-fields. */

	_adjustDate: function(id, offset, period) {

		var target = $(id);

		var 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 target = $(id);

		var 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 {

		var 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);

		var inst = this._getInst(target[0]);

		inst._selectingMonthYear = false;

		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);

	},



	/* Restore input focus after not changing month/year. */

	_clickMonthYear: function(id) {

		var target = $(id);

		var inst = this._getInst(target[0]);

		if (inst.input && inst._selectingMonthYear && !$.browser.msie)

			inst.input[0].focus();

		inst._selectingMonthYear = !inst._selectingMonthYear;

	},



	/* Action for selecting a day. */

	_selectDay: function(id, month, year, td) {

		var target = $(id);

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

			return;

		}

		var inst = this._getInst(target[0]);

		inst.selectedDay = inst.currentDay = $('a', td).html();

		inst.selectedMonth = inst.currentMonth = month;

		inst.selectedYear = inst.currentYear = year;

		if (inst.stayOpen) {

			inst.endDay = inst.endMonth = inst.endYear = null;

		}

		this._selectDate(id, this._formatDate(inst,

			inst.currentDay, inst.currentMonth, inst.currentYear));

		if (inst.stayOpen) {

			inst.rangeStart = this._daylightSavingAdjust(

				new Date(inst.currentYear, inst.currentMonth, inst.currentDay));

			this._updateDatepicker(inst);

		}

	},



	/* Erase the input field and hide the date picker. */

	_clearDate: function(id) {

		var target = $(id);

		var inst = this._getInst(target[0]);

		inst.stayOpen = false;

		inst.endDay = inst.endMonth = inst.endYear = inst.rangeStart = null;

		this._selectDate(target, '');

	},



	/* Update the input field with the selected date. */

	_selectDate: function(id, dateStr) {

		var target = $(id);

		var inst = this._getInst(target[0]);

		dateStr = (dateStr != null ? dateStr : this._formatDate(inst));

		if (inst.input)

			inst.input.val(dateStr);

		this._updateAlternate(inst);

		var 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 if (!inst.stayOpen) {

			this._hideDatepicker(null, this._get(inst, 'duration'));

			this._lastInput = inst.input[0];

			if (typeof(inst.input[0]) != 'object')

				inst.input[0].focus(); // restore focus

			this._lastInput = null;

		}

	},



	/* Update any alternate field to synchronise with the main field. */

	_updateAlternate: function(inst) {

		var altField = this._get(inst, 'altField');

		if (altField) { // update alternate field too

			var altFormat = this._get(inst, 'altFormat') || this._get(inst, 'dateFormat');

			var date = this._getDate(inst);

			dateStr = this.formatDate(altFormat, date, this._getFormatConfig(inst));

			$(altField).each(function() { $(this).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 checkDate = new Date(date.getFullYear(), date.getMonth(), date.getDate());

		var firstMon = new Date(checkDate.getFullYear(), 1 - 1, 4); // First week always contains 4 Jan

		var firstDay = firstMon.getDay() || 7; // Day of week: Mon = 1, ..., Sun = 7

		firstMon.setDate(firstMon.getDate() + 1 - firstDay); // Preceding Monday

		if (firstDay < 4 && checkDate < firstMon) { // Adjust first three days in year if necessary

			checkDate.setDate(checkDate.getDate() - 3); // Generate for previous year

			return $.datepicker.iso8601Week(checkDate);

		} else if (checkDate > new Date(checkDate.getFullYear(), 12 - 1, 28)) { // Check last three days in year

			firstDay = new Date(checkDate.getFullYear() + 1, 1 - 1, 4).getDay() || 7;

			if (firstDay > 4 && (checkDate.getDay() || 7) < firstDay - 3) { // Adjust if necessary

				return 1;

			}

		}

		return Math.floor(((checkDate - firstMon) / 86400000) / 7) + 1; // Weeks to given date

	},



	/* 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 shortYearCutoff = (settings ? settings.shortYearCutoff : null) || this._defaults.shortYearCutoff;

		var dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort;

		var dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames;

		var monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort;

		var monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames;

		var year = -1;

		var month = -1;

		var day = -1;

		var doy = -1;

		var literal = false;

		// Check whether a format character is doubled

		var 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

		var getNumber = function(match) {

			lookAhead(match);

			var origSize = (match == '@' ? 14 : (match == 'y' ? 4 : (match == 'o' ? 3 : 2)));

			var size = origSize;

			var num = 0;

			while (size > 0 && iValue < value.length &&

					value.charAt(iValue) >= '0' && value.charAt(iValue) <= '9') {

				num = num * 10 + parseInt(value.charAt(iValue++),10);

				size--;

			}

			if (size == origSize)

				throw 'Missing number at position ' + iValue;

			return num;

		};

		// Extract a name from the string value and convert to an index

		var getName = function(match, shortNames, longNames) {

			var names = (lookAhead(match) ? longNames : shortNames);

			var size = 0;

			for (var j = 0; j < names.length; j++)

				size = Math.max(size, names[j].length);

			var name = '';

			var iInit = iValue;

			while (size > 0 && iValue < value.length) {

				name += value.charAt(iValue++);

				for (var i = 0; i < names.length; i++)

					if (name == names[i])

						return i + 1;

				size--;

			}

			throw 'Unknown name at position ' + iInit;

		};

		// Confirm that a literal character matches the string value

		var checkLiteral = function() {

			if (value.charAt(iValue) != format.charAt(iFormat))

				throw 'Unexpected literal at position ' + iValue;

			iValue++;

		};

		var iValue = 0;

		for (var 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 '@':

						var date = new Date(getNumber('@'));

						year = date.getFullYear();

						month = date.getMonth() + 1;

						day = date.getDate();

						break;

					case "'":

						if (lookAhead("'"))

							checkLiteral();

						else

							literal = true;

						break;

					default:

						checkLiteral();

				}

		}

		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 {

				var dim = this._getDaysInMonth(year, month - 1);

				if (day <= dim)

					break;

				month++;

				day -= dim;

			} while (true);

		}

		var 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/*

		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

	TIMESTAMP: '@',

	W3C: 'yy-mm-dd', // ISO 8601



	/* 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)

	   '...' - 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 dayNamesShort = (settings ? settings.dayNamesShort : null) || this._defaults.dayNamesShort;

		var dayNames = (settings ? settings.dayNames : null) || this._defaults.dayNames;

		var monthNamesShort = (settings ? settings.monthNamesShort : null) || this._defaults.monthNamesShort;

		var monthNames = (settings ? settings.monthNames : null) || this._defaults.monthNames;

		// Check whether a format character is doubled

		var 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

		var 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

		var formatName = function(match, value, shortNames, longNames) {

			return (lookAhead(match) ? longNames[value] : shortNames[value]);

		};

		var output = '';

		var literal = false;

		if (date)

			for (var 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':

							var doy = date.getDate();

							for (var m = date.getMonth() - 1; m >= 0; m--)

								doy += this._getDaysInMonth(date.getFullYear(), m);

							output += formatNumber('o', doy, 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.getYear() % 100 < 10 ? '0' : '') + date.getYear() % 100);

							break;

						case '@':

							output += date.getTime();

							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 chars = '';

		var literal = false;

		for (var 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) {

		var dateFormat = this._get(inst, 'dateFormat');

		var dates = inst.input ? inst.input.val() : null;

		inst.endDay = inst.endMonth = inst.endYear = null;

		var date = defaultDate = this._getDefaultDate(inst);

		var settings = this._getFormatConfig(inst);

		try {

			date = this.parseDate(dateFormat, dates, settings) || defaultDate;

		} catch (event) {

			this.log(event);

			date = defaultDate;

		}

		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) {

		var date = this._determineDate(this._get(inst, 'defaultDate'), new Date());

		var minDate = this._getMinMaxDate(inst, 'min', true);

		var maxDate = this._getMinMaxDate(inst, 'max');

		date = (minDate && date < minDate ? minDate : date);

		date = (maxDate && date > maxDate ? maxDate : date);

		return date;

	},



	/* A date may be specified as an exact value or a relative one. */

	_determineDate: function(date, defaultDate) {

		var offsetNumeric = function(offset) {

			var date = new Date();

			date.setDate(date.getDate() + offset);

			return date;

		};

		var offsetString = function(offset, getDaysInMonth) {

			var date = new Date();

			var year = date.getFullYear();

			var month = date.getMonth();

			var day = date.getDate();

			var pattern = /([+-]?[0-9]+)\s*(d|D|w|W|m|M|y|Y)?/g;

			var 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, getDaysInMonth(year, month));

						break;

					case 'y': case 'Y' :

						year += parseInt(matches[1],10);

						day = Math.min(day, getDaysInMonth(year, month));

						break;

				}

				matches = pattern.exec(offset);

			}

			return new Date(year, month, day);

		};

		date = (date == null ? defaultDate :

			(typeof date == 'string' ? offsetString(date, this._getDaysInMonth) :

			(typeof date == 'number' ? (isNaN(date) ? defaultDate : offsetNumeric(date)) : date)));

		date = (date && date.toString() == 'Invalid Date' ? defaultDate : date);

		if (date) {

			date.setHours(0);

			date.setMinutes(0);

			date.setSeconds(0);

			date.setMilliseconds(0);

		}

		return this._daylightSavingAdjust(date);

	},



	/* 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, endDate) {

		var clear = !(date);

		var origMonth = inst.selectedMonth;

		var origYear = inst.selectedYear;

		date = this._determineDate(date, new Date());

		inst.selectedDay = inst.currentDay = date.getDate();

		inst.drawMonth = inst.selectedMonth = inst.currentMonth = date.getMonth();

		inst.drawYear = inst.selectedYear = inst.currentYear = date.getFullYear();

		if (origMonth != inst.selectedMonth || origYear != inst.selectedYear)

			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;

	},



	/* Generate the HTML for the current state of the date picker. */

	_generateHTML: function(inst) {

		var today = new Date();

		today = this._daylightSavingAdjust(

			new Date(today.getFullYear(), today.getMonth(), today.getDate())); // clear time

		var isRTL = this._get(inst, 'isRTL');

		var showButtonPanel = this._get(inst, 'showButtonPanel');

		var hideIfNoPrevNext = this._get(inst, 'hideIfNoPrevNext');

		var navigationAsDateFormat = this._get(inst, 'navigationAsDateFormat');

		var numMonths = this._getNumberOfMonths(inst);

		var showCurrentAtPos = this._get(inst, 'showCurrentAtPos');

		var stepMonths = this._get(inst, 'stepMonths');

		var stepBigMonths = this._get(inst, 'stepBigMonths');

		var isMultiMonth = (numMonths[0] != 1 || numMonths[1] != 1);

		var currentDate = this._daylightSavingAdjust((!inst.currentDay ? new Date(9999, 9, 9) :

			new Date(inst.currentYear, inst.currentMonth, inst.currentDay)));

		var minDate = this._getMinMaxDate(inst, 'min', true);

		var maxDate = this._getMinMaxDate(inst, 'max');

		var drawMonth = inst.drawMonth - showCurrentAtPos;

		var drawYear = inst.drawYear;

		if (drawMonth < 0) {

			drawMonth += 12;

			drawYear--;

		}

		if (maxDate) {

			var maxDraw = this._daylightSavingAdjust(new Date(maxDate.getFullYear(),

				maxDate.getMonth() - 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;

		var prevText = this._get(inst, 'prevText');

		prevText = (!navigationAsDateFormat ? prevText : this.formatDate(prevText,

			this._daylightSavingAdjust(new Date(drawYear, drawMonth - stepMonths, 1)),

			this._getFormatConfig(inst)));

		var prev = (this._canAdjustMonth(inst, -1, drawYear, drawMonth) ?

			'<a class="ui-datepicker-prev ui-corner-all" onclick="DP_jQuery.datepicker._adjustDate(\'#' + inst.id + '\', -' + stepMonths + ', \'M\');"' +

			' 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>'));

		var nextText = this._get(inst, 'nextText');

		nextText = (!navigationAsDateFormat ? nextText : this.formatDate(nextText,

			this._daylightSavingAdjust(new Date(drawYear, drawMonth + stepMonths, 1)),

			this._getFormatConfig(inst)));

		var next = (this._canAdjustMonth(inst, +1, drawYear, drawMonth) ?

			'<a class="ui-datepicker-next ui-corner-all" onclick="DP_jQuery.datepicker._adjustDate(\'#' + inst.id + '\', +' + stepMonths + ', \'M\');"' +

			' 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>'));

		var currentText = this._get(inst, 'currentText');

		var gotoDate = (this._get(inst, 'gotoCurrent') && inst.currentDay ? currentDate : today);

		currentText = (!navigationAsDateFormat ? currentText :

			this.formatDate(currentText, gotoDate, this._getFormatConfig(inst)));

		var controls = (!inst.inline ? '<button type="button" class="ui-datepicker-close ui-state-default ui-priority-primary ui-corner-all" onclick="DP_jQuery.datepicker._hideDatepicker();">' + this._get(inst, 'closeText') + '</button>' : '');

		var 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" onclick="DP_jQuery.datepicker._gotoToday(\'#' + inst.id + '\');"' +

			'>' + currentText + '</button>' : '') + (isRTL ? '' : controls) + '</div>' : '';

		var firstDay = parseInt(this._get(inst, 'firstDay'),10);

		firstDay = (isNaN(firstDay) ? 0 : firstDay);

		var dayNames = this._get(inst, 'dayNames');

		var dayNamesShort = this._get(inst, 'dayNamesShort');

		var dayNamesMin = this._get(inst, 'dayNamesMin');

		var monthNames = this._get(inst, 'monthNames');

		var monthNamesShort = this._get(inst, 'monthNamesShort');

		var beforeShowDay = this._get(inst, 'beforeShowDay');

		var showOtherMonths = this._get(inst, 'showOtherMonths');

		var calculateWeek = this._get(inst, 'calculateWeek') || this.iso8601Week;

		var endDate = inst.endDay ? this._daylightSavingAdjust(

			new Date(inst.endYear, inst.endMonth, inst.endDay)) : currentDate;

		var defaultDate = this._getDefaultDate(inst);

		var html = '';

		for (var row = 0; row < numMonths[0]; row++) {

			var group = '';

			for (var col = 0; col < numMonths[1]; col++) {

				var selectedDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, inst.selectedDay));

				var cornerClass = ' ui-corner-all';

				var calender = '';

				if (isMultiMonth) {

					calender += '<div class="ui-datepicker-group ui-datepicker-group-';

					switch (col) {

						case 0: calender += 'first'; cornerClass = ' ui-corner-' + (isRTL ? 'right' : 'left'); break;

						case numMonths[1]-1: calender += 'last'; cornerClass = ' ui-corner-' + (isRTL ? 'left' : 'right'); break;

						default: calender += '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,

					selectedDate, row > 0 || col > 0, monthNames, monthNamesShort) + // draw month headers

					'</div><table class="ui-datepicker-calendar"><thead>' +

					'<tr>';

				var thead = '';

				for (var dow = 0; dow < 7; dow++) { // days of the week

					var day = (dow + firstDay) % 7;

					thead += '<th' + ((dow + firstDay + 6) % 7 >= 5 ? ' class="ui-datepicker-week-end"' : '') + '>' +

						'<span title="' + dayNames[day] + '">' + dayNamesMin[day] + '</span></th>';

				}

				calender += thead + '</tr></thead><tbody>';

				var daysInMonth = this._getDaysInMonth(drawYear, drawMonth);

				if (drawYear == inst.selectedYear && drawMonth == inst.selectedMonth)

					inst.selectedDay = Math.min(inst.selectedDay, daysInMonth);

				var leadDays = (this._getFirstDayOfMonth(drawYear, drawMonth) - firstDay + 7) % 7;

				var numRows = (isMultiMonth ? 6 : Math.ceil((leadDays + daysInMonth) / 7)); // calculate the number of rows to generate

				var printDate = this._daylightSavingAdjust(new Date(drawYear, drawMonth, 1 - leadDays));

				for (var dRow = 0; dRow < numRows; dRow++) { // create date picker rows

					calender += '<tr>';

					var tbody = '';

					for (var dow = 0; dow < 7; dow++) { // create date picker days

						var daySettings = (beforeShowDay ?

							beforeShowDay.apply((inst.input ? inst.input[0] : null), [printDate]) : [true, '']);

						var otherMonth = (printDate.getMonth() != drawMonth);

						var unselectable = otherMonth || !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() && printDate.getTime() <= endDate.getTime() ? // in current range

							' ' + this._currentClass : '') + // highlight selected day

							(printDate.getTime() == today.getTime() ? ' ui-datepicker-today' : '')) + '"' + // highlight today (if different)

							((!otherMonth || showOtherMonths) && daySettings[2] ? ' title="' + daySettings[2] + '"' : '') + // cell title

							(unselectable ? '' : ' onclick="DP_jQuery.datepicker._selectDay(\'#' +

							inst.id + '\',' + drawMonth + ',' + drawYear + ', this);return false;"') + '>' + // actions

							(otherMonth ? (showOtherMonths ? printDate.getDate() : '&#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() && printDate.getTime() <= endDate.getTime() ? // in current range

							' ui-state-active' : '') + // highlight selected day

							'" href="#">' + printDate.getDate() + '</a>')) + '</td>'; // display for this month

						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 + ($.browser.msie && parseInt($.browser.version,10) < 7 && !inst.inline ?

			'<iframe src="javascript:false;" class="ui-datepicker-cover" frameborder="0"></iframe>' : '');

		inst._keyEvent = false;

		return html;

	},



	/* Generate the month and year header. */

	_generateMonthYearHeader: function(inst, drawMonth, drawYear, minDate, maxDate,

			selectedDate, secondary, monthNames, monthNamesShort) {

		minDate = (inst.rangeStart && minDate && selectedDate < minDate ? selectedDate : minDate);

		var changeMonth = this._get(inst, 'changeMonth');

		var changeYear = this._get(inst, 'changeYear');

		var showMonthAfterYear = this._get(inst, 'showMonthAfterYear');

		var html = '<div class="ui-datepicker-title">';

		var monthHtml = '';

		// month selection

		if (secondary || !changeMonth)

			monthHtml += '<span class="ui-datepicker-month">' + monthNames[drawMonth] + '</span> ';

		else {

			var inMinYear = (minDate && minDate.getFullYear() == drawYear);

			var inMaxYear = (maxDate && maxDate.getFullYear() == drawYear);

			monthHtml += '<select class="ui-datepicker-month" ' +

				'onchange="DP_jQuery.datepicker._selectMonthYear(\'#' + inst.id + '\', this, \'M\');" ' +

				'onclick="DP_jQuery.datepicker._clickMonthYear(\'#' + inst.id + '\');"' +

			 	'>';

			for (var 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) && (!(changeMonth && changeYear)) ? '&#xa0;' : '');

		// year selection

		if (secondary || !changeYear)

			html += '<span class="ui-datepicker-year">' + drawYear + '</span>';

		else {

			// determine range of years to display

			var years = this._get(inst, 'yearRange').split(':');

			var year = 0;

			var endYear = 0;

			if (years.length != 2) {

				year = drawYear - 10;

				endYear = drawYear + 10;

			} else if (years[0].charAt(0) == '+' || years[0].charAt(0) == '-') {

				year = drawYear + parseInt(years[0], 10);

				endYear = drawYear + parseInt(years[1], 10);

			} else {

				year = parseInt(years[0], 10);

				endYear = parseInt(years[1], 10);

			}

			year = (minDate ? Math.max(year, minDate.getFullYear()) : year);

			endYear = (maxDate ? Math.min(endYear, maxDate.getFullYear()) : endYear);

			html += '<select class="ui-datepicker-year" ' +

				'onchange="DP_jQuery.datepicker._selectMonthYear(\'#' + inst.id + '\', this, \'Y\');" ' +

				'onclick="DP_jQuery.datepicker._clickMonthYear(\'#' + inst.id + '\');"' +

				'>';

			for (; year <= endYear; year++) {

				html += '<option value="' + year + '"' +

					(year == drawYear ? ' selected="selected"' : '') +

					'>' + year + '</option>';

			}

			html += '</select>';

		}

		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.drawYear + (period == 'Y' ? offset : 0);

		var month = inst.drawMonth + (period == 'M' ? offset : 0);

		var day = Math.min(inst.selectedDay, this._getDaysInMonth(ye