/* http://keith-wood.name/datepick.html
   Date picker for jQuery v5.0.1.
   Written by Keith Wood (kbwood{at}iinet.com.au) February 2010.
   Licensed under the MIT (http://keith-wood.name/licence.html) licence.
   Please attribute the author if you use it. */

/*
This file is not used by HBook. It is just here for reference because some lines of this library have been changed.
Search for "maestrel".
The file which is actually used is jquery.datepick.min.js
In jquery.datepick.min.js the commented out lines are deleted.
*/

(function($) { // Hide scope, no $ conflict

	var pluginName = 'datepick';


	/** Create the datepicker plugin.
		<p>Sets an input field to popup a calendar for date entry,
			or a <code>div</code> or <code>span</code> to show an inline calendar.</p>
		<p>Expects HTML like:</p>
		<pre>&lt;input type="text"> or &lt;div>&lt;/div></pre>
		<p>Provide inline configuration like:</p>
		<pre>&lt;input type="text" data-datepick="name: 'value'"/></pre>
	 	@module Datepick
		@augments JQPlugin
		@example $(selector).datepick()
 $(selector).datepick({minDate: 0, maxDate: '+1m +1w'}) */
	$.JQPlugin.createPlugin({

		/** The name of the plugin. */
		name: pluginName,

		/** Default template for generating a datepicker.
			Insert anywhere: '{l10n:name}' to insert localised value for name,
			'{link:name}' to insert a link trigger for command name,
			'{button:name}' to insert a button trigger for command name,
			'{popup:start}...{popup:end}' to mark a section for inclusion in a popup datepicker only,
			'{inline:start}...{inline:end}' to mark a section for inclusion in an inline datepicker only.
			@property picker {string} Overall structure: '{months}' to insert calendar months.
			@property monthRow {string} One row of months: '{months}' to insert calendar months.
			@property month {string} A single month: '{monthHeader<em>:dateFormat</em>}' to insert the month header -
						<em>dateFormat</em> is optional and defaults to 'MM yyyy',
						'{weekHeader}' to insert a week header, '{weeks}' to insert the month's weeks.
			@property weekHeader {string} A week header: '{days}' to insert individual day names.
			@property dayHeader {string} Individual day header: '{day}' to insert day name.
			@property week {string} One week of the month: '{days}' to insert the week's days,
						'{weekOfYear}' to insert week of year.
			@property day {string} An individual day: '{day}' to insert day value.
			@property monthSelector {string} jQuery selector, relative to picker, for a single month.
			@property daySelector {string} jQuery selector, relative to picker, for individual days.
			@property rtlClass {string} Class for right-to-left (RTL) languages.
			@property multiClass {string} Class for multi-month datepickers.
			@property defaultClass {string} Class for selectable dates.
			@property selectedClass {string} Class for currently selected dates.
			@property highlightedClass {string} Class for highlighted dates.
			@property todayClass {string} Class for today.
			@property otherMonthClass {string} Class for days from other months.
			@property weekendClass {string} Class for days on weekends.
			@property commandClass {string} Class prefix for commands.
			@property commandButtonClass {string} Extra class(es) for commands that are buttons.
			@property commandLinkClass {string} Extra class(es) for commands that are links.
			@property disabledClass {string} Class for disabled commands. */
		defaultRenderer: {
			picker: '<div class="datepick">' +
			'<div class="datepick-nav">{link:prev}{link:today}{link:next}</div>{months}' +
			'{popup:start}<div class="datepick-ctrl">{link:clear}{link:close}</div>{popup:end}' +
			'<div class="datepick-clear-fix"></div></div>',
			monthRow: '<div class="datepick-month-row">{months}</div>',
			month: '<div class="datepick-month"><div class="datepick-month-header">{monthHeader}</div>' +
			'<table><thead>{weekHeader}</thead><tbody>{weeks}</tbody></table></div>',
			weekHeader: '<tr>{days}</tr>',
			dayHeader: '<th>{day}</th>',
			week: '<tr>{days}</tr>',
			day: '<td>{day}</td>',
			monthSelector: '.datepick-month',
			daySelector: 'td',
			rtlClass: 'datepick-rtl',
			multiClass: 'datepick-multi',
			defaultClass: '',
			selectedClass: 'datepick-selected',
			highlightedClass: 'datepick-highlight',
			todayClass: 'datepick-today',
			otherMonthClass: 'datepick-other-month',
			weekendClass: 'datepick-weekend',
			commandClass: 'datepick-cmd',
			commandButtonClass: '',
			commandLinkClass: '',
			disabledClass: 'datepick-disabled'
		},

		/** Command actions that may be added to a layout by name.
			<ul>
			<li>prev - Show the previous month (based on <code>monthsToStep</code> option) - <em>PageUp</em></li>
			<li>prevJump - Show the previous year (based on <code>monthsToJump</code> option) - <em>Ctrl+PageUp</em></li>
			<li>next - Show the next month (based on <code>monthsToStep</code> option) - <em>PageDown</em></li>
			<li>nextJump - Show the next year (based on <code>monthsToJump</code> option) - <em>Ctrl+PageDown</em></li>
			<li>current - Show the currently selected month or today's if none selected - <em>Ctrl+Home</em></li>
			<li>today - Show today's month - <em>Ctrl+Home</em></li>
			<li>clear - Erase the date and close the datepicker popup - <em>Ctrl+End</em></li>
			<li>close - Close the datepicker popup - <em>Esc</em></li>
			<li>prevWeek - Move the cursor to the previous week - <em>Ctrl+Up</em></li>
			<li>prevDay - Move the cursor to the previous day - <em>Ctrl+Left</em></li>
			<li>nextDay - Move the cursor to the next day - <em>Ctrl+Right</em></li>
			<li>nextWeek - Move the cursor to the next week - <em>Ctrl+Down</em></li>
			</ul>
			The command name is the key name and is used to add the command to a layout
			with '{button:name}' or '{link:name}'. Each has the following attributes.
			@property text {string} The field in the regional settings for the displayed text.
			@property status {string} The field in the regional settings for the status text.
			@property keystroke {object} The keystroke to trigger the action, with attributes:
				<code>keyCode</code> {number} the code for the keystroke,
				<code>ctrlKey</code> {boolean} <code>true</code> if <em>Ctrl</em> is required,
				<code>altKey</code> {boolean} <code>true</code> if <em>Alt</em> is required,
				<code>shiftKey</code> {boolean} <code>true</code> if <em>Shift</em> is required.
			@property enabled {DatepickCommandEnabled} The function that indicates the command is enabled.
			@property date {DatepickCommandDate} The function to get the date associated with this action.
			@property action {DatepickCommandAction} The function that implements the action. */
		commands: {
			prev: {text: 'prevText', status: 'prevStatus', // Previous month
				keystroke: {keyCode: 33}, // Page up
				enabled: function(inst) {
					var minDate = inst.curMinDate();
					return (!minDate || plugin.add(plugin.day(
						plugin._applyMonthsOffset(plugin.add(plugin.newDate(inst.drawDate),
						1 - inst.options.monthsToStep, 'm'), inst), 1), -1, 'd').
						getTime() >= minDate.getTime()); },
				date: function(inst) {
					return plugin.day(plugin._applyMonthsOffset(plugin.add(
						plugin.newDate(inst.drawDate), -inst.options.monthsToStep, 'm'), inst), 1); },
				action: function(inst) {
					plugin.changeMonth(this, -inst.options.monthsToStep); }
			},
			prevJump: {text: 'prevJumpText', status: 'prevJumpStatus', // Previous year
				keystroke: {keyCode: 33, ctrlKey: true}, // Ctrl + Page up
				enabled: function(inst) {
					var minDate = inst.curMinDate();
					return (!minDate || plugin.add(plugin.day(
						plugin._applyMonthsOffset(plugin.add(plugin.newDate(inst.drawDate),
						1 - inst.options.monthsToJump, 'm'), inst), 1), -1, 'd').
						getTime() >= minDate.getTime()); },
				date: function(inst) {
					return plugin.day(plugin._applyMonthsOffset(plugin.add(
						plugin.newDate(inst.drawDate), -inst.options.monthsToJump, 'm'), inst), 1); },
				action: function(inst) {
					plugin.changeMonth(this, -inst.options.monthsToJump); }
			},
			next: {text: 'nextText', status: 'nextStatus', // Next month
				keystroke: {keyCode: 34}, // Page down
				enabled: function(inst) {
					var maxDate = inst.get('maxDate');
					return (!maxDate || plugin.day(plugin._applyMonthsOffset(plugin.add(
						plugin.newDate(inst.drawDate), inst.options.monthsToStep, 'm'), inst), 1).
						getTime() <= maxDate.getTime()); },
				date: function(inst) {
					return plugin.day(plugin._applyMonthsOffset(plugin.add(
						plugin.newDate(inst.drawDate), inst.options.monthsToStep, 'm'), inst), 1); },
				action: function(inst) {
					plugin.changeMonth(this, inst.options.monthsToStep); }
			},
			nextJump: {text: 'nextJumpText', status: 'nextJumpStatus', // Next year
				keystroke: {keyCode: 34, ctrlKey: true}, // Ctrl + Page down
				enabled: function(inst) {
					var maxDate = inst.get('maxDate');
					return (!maxDate || plugin.day(plugin._applyMonthsOffset(plugin.add(
						plugin.newDate(inst.drawDate), inst.options.monthsToJump, 'm'), inst), 1).
						getTime() <= maxDate.getTime()); },
				date: function(inst) {
					return plugin.day(plugin._applyMonthsOffset(plugin.add(
						plugin.newDate(inst.drawDate), inst.options.monthsToJump, 'm'), inst), 1); },
				action: function(inst) {
					plugin.changeMonth(this, inst.options.monthsToJump); }
			},
			current: {text: 'currentText', status: 'currentStatus', // Current month
				keystroke: {keyCode: 36, ctrlKey: true}, // Ctrl + Home
				enabled: function(inst) {
					var minDate = inst.curMinDate();
					var maxDate = inst.get('maxDate');
					var curDate = inst.selectedDates[0] || plugin.today();
					return (!minDate || curDate.getTime() >= minDate.getTime()) &&
						(!maxDate || curDate.getTime() <= maxDate.getTime()); },
				date: function(inst) {
					return inst.selectedDates[0] || plugin.today(); },
				action: function(inst) {
					var curDate = inst.selectedDates[0] || plugin.today();
					plugin.showMonth(this, curDate.getFullYear(), curDate.getMonth() + 1); }
			},
			today: {text: 'todayText', status: 'todayStatus', // Today's month
				keystroke: {keyCode: 36, ctrlKey: true}, // Ctrl + Home
				enabled: function(inst) {
					var minDate = inst.curMinDate();
					var maxDate = inst.get('maxDate');
					return (!minDate || plugin.today().getTime() >= minDate.getTime()) &&
						(!maxDate || plugin.today().getTime() <= maxDate.getTime()); },
				date: function(inst) { return plugin.today(); },
				action: function(inst) { plugin.showMonth(this); }
			},
			clear: {text: 'clearText', status: 'clearStatus', // Clear the datepicker
				keystroke: {keyCode: 35, ctrlKey: true}, // Ctrl + End
				enabled: function(inst) { return true; },
				date: function(inst) { return null; },
				action: function(inst) { plugin.clear(this); }
			},
			close: {text: 'closeText', status: 'closeStatus', // Close the datepicker
				keystroke: {keyCode: 27}, // Escape
				enabled: function(inst) { return true; },
				date: function(inst) { return null; },
				action: function(inst) { plugin.hide(this); }
			},
			prevWeek: {text: 'prevWeekText', status: 'prevWeekStatus', // Previous week
				keystroke: {keyCode: 38, ctrlKey: true}, // Ctrl + Up
				enabled: function(inst) {
					var minDate = inst.curMinDate();
					return (!minDate || plugin.add(plugin.newDate(inst.drawDate), -7, 'd').
						getTime() >= minDate.getTime()); },
				date: function(inst) { return plugin.add(plugin.newDate(inst.drawDate), -7, 'd'); },
				action: function(inst) { plugin.changeDay(this, -7); }
			},
			prevDay: {text: 'prevDayText', status: 'prevDayStatus', // Previous day
				keystroke: {keyCode: 37, ctrlKey: true}, // Ctrl + Left
				enabled: function(inst) {
					var minDate = inst.curMinDate();
					return (!minDate || plugin.add(plugin.newDate(inst.drawDate), -1, 'd').
						getTime() >= minDate.getTime()); },
				date: function(inst) { return plugin.add(plugin.newDate(inst.drawDate), -1, 'd'); },
				action: function(inst) { plugin.changeDay(this, -1); }
			},
			nextDay: {text: 'nextDayText', status: 'nextDayStatus', // Next day
				keystroke: {keyCode: 39, ctrlKey: true}, // Ctrl + Right
				enabled: function(inst) {
					var maxDate = inst.get('maxDate');
					return (!maxDate || plugin.add(plugin.newDate(inst.drawDate), 1, 'd').
						getTime() <= maxDate.getTime()); },
				date: function(inst) { return plugin.add(plugin.newDate(inst.drawDate), 1, 'd'); },
				action: function(inst) { plugin.changeDay(this, 1); }
			},
			nextWeek: {text: 'nextWeekText', status: 'nextWeekStatus', // Next week
				keystroke: {keyCode: 40, ctrlKey: true}, // Ctrl + Down
				enabled: function(inst) {
					var maxDate = inst.get('maxDate');
					return (!maxDate || plugin.add(plugin.newDate(inst.drawDate), 7, 'd').
						getTime() <= maxDate.getTime()); },
				date: function(inst) { return plugin.add(plugin.newDate(inst.drawDate), 7, 'd'); },
				action: function(inst) { plugin.changeDay(this, 7); }
			}
		},

		/** Determine whether a command is enabled.
			@callback DatepickCommandEnabled
			@param inst {object} The current instance settings.
			@return {boolean} <code>true</code> if this command is enabled, <code>false</code> if not.
			@example enabled: function(inst) {
	return !!inst.curMinDate();
 } */

		/** Calculate the representative date for a command.
			@callback DatepickCommandDate
			@param inst {object} The current instance settings.
			@return {Date} A date appropriate for this command.
			@example date: function(inst) {
	return inst.curMinDate();
 } */

		/** Perform the action for a command.
			@callback DatepickCommandAction
			@param inst {object} The current instance settings.
			@example date: function(inst) {
	$.datepick.setDate(inst.elem, inst.curMinDate());
 } */

		/** Calculate the week of the year for a date.
			@callback DatepickCalculateWeek
			@param date {Date} The date to evaluate.
			@return {number} The week of the year.
			@example calculateWeek: function(date) {
	return Math.floor(($.datepick.dayOfYear(date) - 1) / 7) + 1;
 } */

		/** Provide information about an individual date shown in the calendar.
			@callback DatepickOnDate
			@param date {Date} The date to evaluate.
			@return {object} Information about that date, with the properties above.
			@property selectable {boolean} <code>true</code> if this date can be selected.
			@property dateClass {string} Class(es) to be applied to the date.
			@property content {string} The date cell content.
			@property tooltip {string} A popup tooltip for the date.
			@example onDate: function(date) {
	return {selectable: date.getDay() > 0 && date.getDay() &lt; 5,
		dateClass: date.getDay() == 4 ? 'last-day' : ''};
 } */

		/** Update the datepicker display.
			@callback DatepickOnShow
			@param picker {jQuery} The datepicker <code>div</code> to be shown.
			@param inst {object} The current instance settings.
			@example onShow: function(picker, inst) {
	picker.append('&lt;button type="button">Hi&lt;/button>').
		find('button:last').click(function() {
			alert('Hi!');
		});
 } */

		/** React to navigating through the months/years.
			@callback DatepickOnChangeMonthYear
			@param year {number} The new year.
			@param month {number} The new month (1 to 12).
			@example onChangeMonthYear: function(year, month) {
	alert('Now in ' + month + '/' + year);
 } */

		/** Datepicker on select callback.
			Triggered when a date is selected.
			@callback DatepickOnSelect
			@param dates {Date[]} The selected date(s).
			@example onSelect: function(dates) {
 	alert('Selected ' + dates);
 } */

		/** Datepicker on close callback.
			Triggered when a popup calendar is closed.
			@callback DatepickOnClose
			@param dates {Date[]} The selected date(s).
			@example onClose: function(dates) {
 	alert('Selected ' + dates);
 } */

		/** Default settings for the plugin.
			@property [pickerClass=''] {string} CSS class to add to this instance of the datepicker.
			@property [showOnFocus=true] {boolean} <code>true</code> for popup on focus, <code>false</code> for not.
			@property [showTrigger=null] {string|Element|jQuery} Element to be cloned for a trigger, <code>null</code> for none.
			@property [showAnim='show'] {string} Name of jQuery animation for popup, '' for no animation.
			@property [showOptions=null] {object} Options for enhanced animations.
			@property [showSpeed='normal'] {string} Duration of display/closure.
			@property [popupContainer=null] {string|Element|jQuery} The element to which a popup calendar is added, <code>null</code> for body.
			@property [alignment='bottom'] {string} Alignment of popup - with nominated corner of input:
						'top' or 'bottom' aligns depending on language direction,
						'topLeft', 'topRight', 'bottomLeft', 'bottomRight'.
			@property [fixedWeeks=false] {boolean} <code>true</code> to always show 6 weeks, <code>false</code> to only show as many as are needed.
			@property [firstDay=0] {number} First day of the week, 0 = Sunday, 1 = Monday, etc.
			@property [calculateWeek=this.iso8601Week] {DatepickCalculateWeek} Calculate week of the year from a date, <code>null</code> for ISO8601.
			@property [monthsToShow=1] {number|number[]} How many months to show, cols or [rows, cols].
			@property [monthsOffset=0] {number} How many months to offset the primary month by;
						may be a function that takes the date and returns the offset.
			@property [monthsToStep=1] {number} How many months to move when prev/next clicked.
			@property [monthsToJump=12] {number} How many months to move when large prev/next clicked.
			@property [useMouseWheel=true] {boolean} <code>true</code> to use mousewheel if available, <code>false</code> to never use it.
			@property [changeMonth=true] {boolean} <code>true</code> to change month/year via drop-down, <code>false</code> for navigation only.
			@property [yearRange='c-10:c+10'] {string} Range of years to show in drop-down: 'any' for direct text entry
						or 'start:end', where start/end are '+-nn' for relative to today
						or 'c+-nn' for relative to the currently selected date
						or 'nnnn' for an absolute year.
			@property [shortYearCutoff='+10'] {string} Cutoff for two-digit year in the current century.
			@property [showOtherMonths=false] {boolean} <code>true</code> to show dates from other months, <code>false</code> to not show them.
			@property [selectOtherMonths=false] {boolean} <code>true</code> to allow selection of dates from other months too.
			@property [defaultDate=null] {string|number|Date} Date to show if no other selected.
			@property [selectDefaultDate=false] {boolean} <code>true</code> to pre-select the default date if no other is chosen.
			@property [minDate=null] {string|number|Date} The minimum selectable date.
			@property [maxDate=null] {string|number|Date} The maximum selectable date.
			@property [dateFormat='mm/dd/yyyy'] {string} Format for dates.
			@property [autoSize=false] {boolean} <code>true</code> to size the input field according to the date format.
			@property [rangeSelect=false] {boolean} Allows for selecting a date range on one date picker.
			@property [rangeSeparator=' - '] {string} Text between two dates in a range.
			@property [multiSelect=0] {number} Maximum number of selectable dates, zero for single select.
			@property [multiSeparator=','] {string} Text between multiple dates.
			@property [onDate=null] {DatepickOnDate} Callback as a date is added to the datepicker.
			@property [onShow=null] {DatepickOnShow} Callback just before a datepicker is shown.
			@property [onChangeMonthYear=null] {DatepickOnChangeMonthYear} Callback when a new month/year is selected.
			@property [onSelect=null] {DatepickOnSelect} Callback when a date is selected.
			@property [onClose=null] {DatepickOnClose} Callback when a datepicker is closed.
			@property [altField=null] {string|Element|jQuery} Alternate field to update in synch with the datepicker.
			@property [altFormat=null] {string} Date format for alternate field, defaults to <code>dateFormat</code>.
			@property [constrainInput=true] {boolean} <code>true</code> to constrain typed input to <code>dateFormat</code> allowed characters.
			@property [commandsAsDateFormat=false] {boolean} <code>true</code> to apply
						<code><a href="#formatDate">formatDate</a></code> to the command texts.
			@property [commands=this.commands] {object} Command actions that may be added to a layout by name. */
		defaultOptions: {
			pickerClass: '',
			showOnFocus: true,
			showTrigger: null,
			showAnim: 'show',
			showOptions: {},
			showSpeed: 'normal',
			popupContainer: null,
			alignment: 'bottom',
			fixedWeeks: false,
			firstDay: 0,
			calculateWeek: null, // this.iso8601Week,
			monthsToShow: 1,
			monthsOffset: 0,
			monthsToStep: 1,
			monthsToJump: 12,
			useMouseWheel: true,
			changeMonth: true,
			yearRange: 'c-10:c+10',
			shortYearCutoff: '+10',
			showOtherMonths: false,
			selectOtherMonths: false,
			defaultDate: null,
			selectDefaultDate: false,
			minDate: null,
			maxDate: null,
			dateFormat: 'mm/dd/yyyy',
			autoSize: false,
			rangeSelect: false,
			rangeSeparator: ' - ',
			multiSelect: 0,
			multiSeparator: ',',
			onDate: null,
			onShow: null,
			onChangeMonthYear: null,
			onSelect: null,
			onClose: null,
			altField: null,
			altFormat: null,
			constrainInput: true,
			commandsAsDateFormat: false,
			commands: {} // this.commands
		},

		/** Localisations for the plugin.
			Entries are objects indexed by the language code ('' being the default US/English).
			Each object has the following attributes.
			@property [monthNames=['January','February','March','April','May','June','July','August','September','October','November','December']]
						The long names of the months.
			@property [monthNamesShort=['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec']]
						The short names of the months.
			@property [dayNames=['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday']]
						The long names of the days of the week.
			@property [dayNamesShort=['Sun','Mon','Tue','Wed','Thu','Fri','Sat']] The short names of the days of the week.
			@property [dayNamesMin=['Su','Mo','Tu','We','Th','Fr','Sa']] The minimal names of the days of the week.
			@property [dateFormat='mm/dd/yyyy'] {string} See options on <code><a href="#formatDate">formatDate</a></code>.
			@property [firstDay=0] {number} The first day of the week, Sun = 0, Mon = 1, etc.
			@property [renderer=this.defaultRenderer] {string} The rendering templates.
			@property [prevText='&lt;Prev'] {string} Text for the previous month command.
			@property [prevStatus='Show the previous month'] {string} Status text for the previous month command.
			@property [prevJumpText='&lt;&lt;'] {string} Text for the previous year command.
			@property [prevJumpStatus='Show the previous year'] {string} Status text for the previous year command.
			@property [nextText='Next&gt;'] {string} Text for the next month command.
			@property [nextStatus='Show the next month'] {string} Status text for the next month command.
			@property [nextJumpText='&gt;&gt;'] {string} Text for the next year command.
			@property [nextJumpStatus='Show the next year'] {string} Status text for the next year command.
			@property [currentText='Current'] {string} Text for the current month command.
			@property [currentStatus='Show the current month'] {string} Status text for the current month command.
			@property [todayText='Today'] {string} Text for the today's month command.
			@property [todayStatus='Show today\'s month'] {string} Status text for the today's month command.
			@property [clearText='Clear'] {string} Text for the clear command.
			@property [clearStatus='Clear all the dates'] {string} Status text for the clear command.
			@property [closeText='Close'] {string} Text for the close command.
			@property [closeStatus='Close the datepicker'] {string} Status text for the close command.
			@property [yearStatus='Change the year'] {string} Status text for year selection.
			@property [earlierText='&#160;&#160;▲'] {string} Text for earlier years.
			@property [laterText='&#160;&#160;▼'] {string} Text for later years.
			@property [monthStatus='Change the month'] {string} Status text for month selection.
			@property [weekText='Wk'] {string} Text for week of the year column header.
			@property [weekStatus='Week of the year'] {string} Status text for week of the year column header.
			@property [dayStatus='Select DD,&#160;M&#160;d,&#160;yyyy'] {string} Status text for selectable days.
			@property [defaultStatus='Select a date'] {string} Status text shown by default.
			@property [isRTL=false] {boolean} <code>true</code> if language is right-to-left. */
		regionalOptions: { // Available regional settings, indexed by language/country code
			'': { // Default regional settings - English/US
				monthNames: ['January', 'February', 'March', 'April', 'May', 'June',
				'July', 'August', 'September', 'October', 'November', 'December'],
				monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
				dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
				dayNamesShort: ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'],
				dayNamesMin: ['Su', 'Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa'],
				dateFormat: 'mm/dd/yyyy',
				firstDay: 0,
				renderer: {}, // this.defaultRenderer
				prevText: '&lt;Prev',
				prevStatus: 'Show the previous month',
				prevJumpText: '&lt;&lt;',
				prevJumpStatus: 'Show the previous year',
				nextText: 'Next&gt;',
				nextStatus: 'Show the next month',
				nextJumpText: '&gt;&gt;',
				nextJumpStatus: 'Show the next year',
				currentText: 'Current',
				currentStatus: 'Show the current month',
				todayText: 'Today',
				todayStatus: 'Show today\'s month',
				clearText: 'Clear',
				clearStatus: 'Clear all the dates',
				closeText: 'Close',
				closeStatus: 'Close the datepicker',
				yearStatus: 'Change the year',
				earlierText: '&#160;&#160;▲',
				laterText: '&#160;&#160;▼',
				monthStatus: 'Change the month',
				weekText: 'Wk',
				weekStatus: 'Week of the year',
				dayStatus: 'Select DD, M d, yyyy',
				defaultStatus: 'Select a date',
				isRTL: false
			}
		},

		/** Names of getter methods - those that can't be chained. */
		_getters: ['getDate', 'isDisabled', 'isSelectable', 'retrieveDate'],

		_disabled: [],

		_popupClass: pluginName + '-popup', // Marker for popup division
		_triggerClass: pluginName + '-trigger', // Marker for trigger element
		_disableClass: pluginName + '-disable', // Marker for disabled element
		_monthYearClass: pluginName + '-month-year', // Marker for month/year inputs
		_curMonthClass: pluginName + '-month-', // Marker for current month/year
		_anyYearClass: pluginName + '-any-year', // Marker for year direct input
		_curDoWClass: pluginName + '-dow-', // Marker for day of week

		_ticksTo1970: (((1970 - 1) * 365 + Math.floor(1970 / 4) - Math.floor(1970 / 100) +
			Math.floor(1970 / 400)) * 24 * 60 * 60 * 10000000),
		_msPerDay: 24 * 60 * 60 * 1000,

		/** The date format for use with Atom (RFC 3339/ISO 8601). */
		ATOM: 'yyyy-mm-dd',
		/** The date format for use with cookies. */
		COOKIE: 'D, dd M yyyy',
		/** The date format for full display. */
		FULL: 'DD, MM d, yyyy',
		/** The date format for use with ISO 8601. */
		ISO_8601: 'yyyy-mm-dd',
		/** The date format for Julian dates. */
		JULIAN: 'J',
		/** The date format for use with RFC 822. */
		RFC_822: 'D, d M yy',
		/** The date format for use with RFC 850. */
		RFC_850: 'DD, dd-M-yy',
		/** The date format for use with RFC 1036. */
		RFC_1036: 'D, d M yy',
		/** The date format for use with RFC 1123. */
		RFC_1123: 'D, d M yyyy',
		/** The date format for use with RFC 2822. */
		RFC_2822: 'D, d M yyyy',
		/** The date format for use with RSS (RFC 822). */
		RSS: 'D, d M yy',
		/** The date format for Windows ticks. */
		TICKS: '!',
		/** The date format for Unix timestamp. */
		TIMESTAMP: '@',
		/** The date format for use with W3C (ISO 8601). */
		W3C: 'yyyy-mm-dd',

		/** Format a date object into a string value.
			The format can be combinations of the following:
			<ul>
			<li>d  - day of month (no leading zero)</li>
			<li>dd - day of month (two digit)</li>
			<li>o  - day of year (no leading zeros)</li>
			<li>oo - day of year (three digit)</li>
			<li>D  - day name short</li>
			<li>DD - day name long</li>
			<li>w  - week of year (no leading zero)</li>
			<li>ww - week of year (two digit)</li>
			<li>m  - month of year (no leading zero)</li>
			<li>mm - month of year (two digit)</li>
			<li>M  - month name short</li>
			<li>MM - month name long</li>
			<li>yy - year (two digit)</li>
			<li>yyyy - year (four digit)</li>
			<li>@  - Unix timestamp (s since 01/01/1970)</li>
			<li>!  - Windows ticks (100ns since 01/01/0001)</li>
			<li>'...' - literal text</li>
			<li>'' - single quote</li>
			</ul>
			@param [format=dateFormat] {string} The desired format of the date.
			@param date {Date} The date value to format.
			@param [settings] {object} With the properties shown below.
			@property [dayNamesShort] {string[]} Abbreviated names of the days from Sunday.
			@property [dayNames] {string[]} Names of the days from Sunday.
			@property [monthNamesShort] {string[]} Abbreviated names of the months.
			@property [monthNames] {string[]} Names of the months.
			@property [calculateWeek] {DatepickCalculateWeek} Function that determines week of the year.
			@return {string} The date in the above format.
			@example var display = $.datepick.formatDate('yyyy-mm-dd', new Date(2014, 12-1, 25)) */
		formatDate: function(format, date, settings) {
			if (typeof format !== 'string') {
				settings = date;
				date = format;
				format = '';
			}
			if (!date) {
				return '';
			}
			format = format || this.defaultOptions.dateFormat;
			settings = settings || {};
			var dayNamesShort = settings.dayNamesShort || this.defaultOptions.dayNamesShort;
			var dayNames = settings.dayNames || this.defaultOptions.dayNames;
			var monthNamesShort = settings.monthNamesShort || this.defaultOptions.monthNamesShort;
			var monthNames = settings.monthNames || this.defaultOptions.monthNames;
			var calculateWeek = settings.calculateWeek || this.defaultOptions.calculateWeek;
			// Check whether a format character is doubled
			var doubled = function(match, step) {
				var matches = 1;
				while (iFormat + matches < format.length && format.charAt(iFormat + matches) === match) {
					matches++;
				}
				iFormat += matches - 1;
				return Math.floor(matches / (step || 1)) > 1;
			};
			// Format a number, with leading zeroes if necessary
			var formatNumber = function(match, value, len, step) {
				var num = '' + value;
				if (doubled(match, step)) {
					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 (doubled(match) ? longNames[value] : shortNames[value]);
			};
			var output = '';
			var literal = false;
			for (var iFormat = 0; iFormat < format.length; iFormat++) {
				if (literal) {
					if (format.charAt(iFormat) === "'" && !doubled("'")) {
						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', this.dayOfYear(date), 3); break;
						case 'w': output += formatNumber('w', calculateWeek(date), 2); break;
						case 'm': output += formatNumber('m', date.getMonth() + 1, 2); break;
						case 'M': output += formatName('M', date.getMonth(),
							monthNamesShort, monthNames); break;
						case 'y':
							output += (doubled('y', 2) ? date.getFullYear() :
								(date.getFullYear() % 100 < 10 ? '0' : '') + date.getFullYear() % 100);
							break;
						case '@': output += Math.floor(date.getTime() / 1000); break;
						case '!': output += date.getTime() * 10000 + this._ticksTo1970; break;
						case "'":
							if (doubled("'")) {
								output += "'";
							}
							else {
								literal = true;
							}
							break;
						default:
							output += format.charAt(iFormat);
					}
				}
			}
			return output;
		},

		/** Parse a string value into a date object.
			See <code><a href="#formatDate">formatDate</a></code> for the possible formats, plus:
			<ul>
			<li>* - ignore rest of string</li>
			</ul>
			@param format {string} The expected format of the date ('' for default datepicker format).
			@param value {string} The date in the above format.
			@param [settings] {object} With the properties shown above.
			@property [shortYearCutoff] {number} the cutoff year for determining the century.
			@property [dayNamesShort] {string[]} abbreviated names of the days from Sunday.
			@property [dayNames] {string[]} names of the days from Sunday.
			@property [monthNamesShort] {string[]} abbreviated names of the months.
			@property [monthNames] {string[]} names of the months.
			@return {Date} The extracted date value or <code>null</code> if value is blank.
			@throws Errors if the format and/or value are missing, if the value doesn't match the format,
					or if the date is invalid.
			@example var date = $.datepick.parseDate('dd/mm/yyyy', '25/12/2014') */
		parseDate: function(format, value, settings) {
			if (value == null) {
				throw 'Invalid arguments';
			}
			value = (typeof value === 'object' ? value.toString() : value + '');
			if (value === '') {
				return null;
			}
			format = format || this.defaultOptions.dateFormat;
			settings = settings || {};
			var shortYearCutoff = settings.shortYearCutoff || this.defaultOptions.shortYearCutoff;
			shortYearCutoff = (typeof shortYearCutoff !== 'string' ? shortYearCutoff :
				this.today().getFullYear() % 100 + parseInt(shortYearCutoff, 10));
			var dayNamesShort = settings.dayNamesShort || this.defaultOptions.dayNamesShort;
			var dayNames = settings.dayNames || this.defaultOptions.dayNames;
			var monthNamesShort = settings.monthNamesShort || this.defaultOptions.monthNamesShort;
			var monthNames = settings.monthNames || this.defaultOptions.monthNames;
			var year = -1;
			var month = -1;
			var day = -1;
			var doy = -1;
			var shortYear = false;
			var literal = false;
			// Check whether a format character is doubled
			var doubled = function(match, step) {
				var matches = 1;
				while (iFormat + matches < format.length && format.charAt(iFormat + matches) === match) {
					matches++;
				}
				iFormat += matches - 1;
				return Math.floor(matches / (step || 1)) > 1;
			};
			// Extract a number from the string value
			var getNumber = function(match, step) {
				var isDoubled = doubled(match, step);
				var size = [2, 3, isDoubled ? 4 : 2, 11, 20]['oy@!'.indexOf(match) + 1];
				var digits = new RegExp('^-?\\d{1,' + size + '}');
				var num = value.substring(iValue).match(digits);
				if (!num) {
					throw 'Missing number at position {0}'.replace(/\{0\}/, iValue);
				}
				iValue += num[0].length;
				return parseInt(num[0], 10);
			};
			// Extract a name from the string value and convert to an index
			var getName = function(match, shortNames, longNames, step) {
				var names = (doubled(match, step) ? longNames : shortNames);
				for (var i = 0; i < names.length; i++) {
					if (value.substr(iValue, names[i].length).toLowerCase() === names[i].toLowerCase()) {
						iValue += names[i].length;
						return i + 1;
					}
				}
				throw 'Unknown name at position {0}'.replace(/\{0\}/, iValue);
			};
			// Confirm that a literal character matches the string value
			var checkLiteral = function() {
				if (value.charAt(iValue) !== format.charAt(iFormat)) {
					throw 'Unexpected literal at position {0}'.replace(/\{0\}/, iValue);
				}
				iValue++;
			};
			var iValue = 0;
			for (var iFormat = 0; iFormat < format.length; iFormat++) {
				if (literal) {
					if (format.charAt(iFormat) === "'" && !doubled("'")) {
						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 'w': getNumber('w'); break;
						case 'm': month = getNumber('m'); break;
						case 'M': month = getName('M', monthNamesShort, monthNames); break;
						case 'y':
							var iSave = iFormat;
							shortYear = !doubled('y', 2);
							iFormat = iSave;
							year = getNumber('y', 2);
							break;
						case '@':
							var date = this._normaliseDate(new Date(getNumber('@') * 1000));
							year = date.getFullYear();
							month = date.getMonth() + 1;
							day = date.getDate();
							break;
						case '!':
							var date = this._normaliseDate(
								new Date((getNumber('!') - this._ticksTo1970) / 10000));
							year = date.getFullYear();
							month = date.getMonth() + 1;
							day = date.getDate();
							break;
						case '*': iValue = value.length; break;
						case "'":
							if (doubled("'")) {
								checkLiteral();
							}
							else {
								literal = true;
							}
							break;
						default: checkLiteral();
					}
				}
			}
			if (iValue < value.length) {
				throw 'Additional text found at end';
			}
			if (year === -1) {
				year = this.today().getFullYear();
			}
			else if (year < 100 && shortYear) {
				year += (shortYearCutoff === -1 ? 1900 : this.today().getFullYear() -
					this.today().getFullYear() % 100 - (year <= shortYearCutoff ? 0 : 100));
			}
			if (doy > -1) {
				month = 1;
				day = doy;
				for (var dim = this.daysInMonth(year, month); day > dim;
						dim = this.daysInMonth(year, month)) {
					month++;
					day -= dim;
				}
			}
			var date = this.newDate(year, month, day);
			if (date.getFullYear() !== year || date.getMonth() + 1 !== month || date.getDate() !== day) {
				throw 'Invalid date';
			}
			return date;
		},

		/** A date may be specified as an exact value or a relative one.
			@param dateSpec {Date|number|string} The date as an object or string
					in the given format or an offset - numeric days from today,
					or string amounts and periods, e.g. '+1m +2w'.
			@param defaultDate {Date} The date to use if no other supplied, may be <code>null</code>.
			@param [currentDate] {Date} The current date as a possible basis for relative dates,
					if <code>null</code> today is used.
			@param dateFormat {string} The expected date format - see <code><a href="#formatDate">formatDate</a></code>.
			@param settings {object} With the properties shown above.
			@property [shortYearCutoff] {number} The cutoff year for determining the century.
			@property [dayNamesShort] {string[]} Abbreviated names of the days from Sunday.
			@property [dayNames] {string[]} Names of the days from Sunday.
			@property [monthNamesShort] {string[]} Abbreviated names of the months.
			@property [monthNames] {string[]} Names of the months.
			@return {Date} The decoded date.
			@example $.datepick.determineDate('+1m +2w', new Date()) */
		determineDate: function(dateSpec, defaultDate, currentDate, dateFormat, settings) {
			if (currentDate && typeof currentDate !== 'object') {
				settings = dateFormat;
				dateFormat = currentDate;
				currentDate = null;
			}
			if (typeof dateFormat !== 'string') {
				settings = dateFormat;
				dateFormat = '';
			}
			var offsetString = function(offset) {
				try {
					return plugin.parseDate(dateFormat, offset, settings);
				}
				catch (e) {
					// Ignore
				}
				offset = offset.toLowerCase();
				var date = (offset.match(/^c/) && currentDate ? plugin.newDate(currentDate) : null) ||
					plugin.today();
				var pattern = /([+-]?[0-9]+)\s*(d|w|m|y)?/g;
				var matches = null;
				while (matches = pattern.exec(offset)) {
					date = plugin.add(date, parseInt(matches[1], 10), matches[2] || 'd');
				}
				return date;
			};
			defaultDate = (defaultDate ? plugin.newDate(defaultDate) : null);
			dateSpec = (dateSpec == null ? defaultDate :
				(typeof dateSpec === 'string' ? offsetString(dateSpec) : (typeof dateSpec === 'number' ?
				(isNaN(dateSpec) || dateSpec === Infinity || dateSpec === -Infinity ? defaultDate :
				plugin.add(plugin.today(), dateSpec, 'd')) : plugin.newDate(dateSpec))));
			return dateSpec;
		},

		/** Find the number of days in a given month.
			@param year {Date|number} The date to get days for or the full year.
			@param month {number} The month (1 to 12).
			@return {number} The number of days in this month.
			@example var days = $.datepick.daysInMonth(2014, 12) */
		daysInMonth: function(year, month) {
			month = (year.getFullYear ? year.getMonth() + 1 : month);
			year = (year.getFullYear ? year.getFullYear() : year);
			return this.newDate(year, month + 1, 0).getDate();
		},

		/** Calculate the day of the year for a date.
			@param year {Date|number} The date to get the day-of-year for or the full year.
			@param month {number} The month (1-12).
			@param day {number} The day.
			@return {number} The day of the year.
			@example var doy = $.datepick.dayOfYear(2014, 12, 25) */
		dayOfYear: function(year, month, day) {
			var date = (year.getFullYear ? year : plugin.newDate(year, month, day));
			var newYear = plugin.newDate(date.getFullYear(), 1, 1);
			return Math.floor((date.getTime() - newYear.getTime()) / plugin._msPerDay) + 1;
		},

		/** Set as <code>calculateWeek</code> to determine the week of the year based on the ISO 8601 definition.
			@param year {Date|number} The date to get the week for or the full year.
			@param month {number} The month (1-12).
			@param day {number} The day.
			@return {number} The number of the week within the year that contains this date.
			@example var week = $.datepick.iso8601Week(2014, 12, 25) */
		iso8601Week: function(year, month, day) {
			var checkDate = (year.getFullYear ?
				new Date(year.getTime()) : plugin.newDate(year, month, day));
			// Find Thursday of this week starting on Monday
			checkDate.setDate(checkDate.getDate() + 4 - (checkDate.getDay() || 7));
			var time = checkDate.getTime();
			checkDate.setMonth(0, 1); // Compare with Jan 1
			return Math.floor(Math.round((time - checkDate) / plugin._msPerDay) / 7) + 1;
		},

		/** Return today's date.
			@return {Date} Today.
			@example $.datepick.today() */
		today: function() {
			return this._normaliseDate(new Date());
		},

		/** Return a new date.
			@param year {Date|number} The date to clone or the year.
			@param month {number} The month (1-12).
			@param day {number} The day.
			@return {Date} The date.
			@example $.datepick.newDate(oldDate)
 $.datepick.newDate(2014, 12, 25) */
		newDate: function(year, month, day) {
			return (!year ? null : (year.getFullYear ? this._normaliseDate(new Date(year.getTime())) :
				new Date(year, month - 1, day, 12)));
		},

		/** Standardise a date into a common format - time portion is 12 noon.
			@private
			@param date {Date} The date to standardise.
			@return {Date} The normalised date. */
		_normaliseDate: function(date) {
			if (date) {
				date.setHours(12, 0, 0, 0);
			}
			return date;
		},

		/** Set the year for a date.
			@param date {Date} The original date.
			@param year {number} The new year.
			@return {Date} The updated date.
			@example $.datepick.year(date, 2014) */
		year: function(date, year) {
			date.setFullYear(year);
			return this._normaliseDate(date);
		},

		/** Set the month for a date.
			@param date  {Date} The original date.
			@param month {number} The new month (1-12).
			@return {Date} The updated date.
			@example $.datepick.month(date, 12) */
		month: function(date, month) {
			date.setMonth(month - 1);
			return this._normaliseDate(date);
		},

		/** Set the day for a date.
			@param date {Date} The original date.
			@param day {number} The new day of the month.
			@return {Date} The updated date.
			@example $.datepick.day(date, 25) */
		day: function(date, day) {
			date.setDate(day);
			return this._normaliseDate(date);
		},

		/** Add a number of periods to a date.
			@param date {Date} The original date.
			@param amount {number} The number of periods.
			@param period {string} The type of period d/w/m/y.
			@return {Date} The updated date.
			@example $.datepick.add(date, 10, 'd') */
		add: function(date, amount, period) {
			if (period === 'd' || period === 'w') {
				this._normaliseDate(date);
				date.setDate(date.getDate() + amount * (period === 'w' ? 7 : 1));
			}
			else {
				var year = date.getFullYear() + (period === 'y' ? amount : 0);
				var month = date.getMonth() + (period === 'm' ? amount : 0);
				date.setTime(plugin.newDate(year, month + 1,
					Math.min(date.getDate(), this.daysInMonth(year, month + 1))).getTime());
			}
			return date;
		},

		/** Apply the months offset value to a date.
			@private
			@param date {Date} The original date.
			@param inst {object} The current instance settings.
			@return {Date} The updated date. */
		_applyMonthsOffset: function(date, inst) {
			var monthsOffset = inst.options.monthsOffset;
			if ($.isFunction(monthsOffset)) {
				monthsOffset = monthsOffset.apply(inst.elem[0], [date]);
			}
			return plugin.add(date, -monthsOffset, 'm');
		},

		_init: function() {
			this.defaultOptions.commands = this.commands;
			this.defaultOptions.calculateWeek = this.iso8601Week;
			this.regionalOptions[''].renderer = this.defaultRenderer;
			this._super();
		},

		_instSettings: function(elem, options) {
			return {selectedDates: [], drawDate: null, pickingRange: false,
				inline: ($.inArray(elem[0].nodeName.toLowerCase(), ['div', 'span']) > -1),
				get: function(name) { // Get a setting value, computing if necessary
					if ($.inArray(name, ['defaultDate', 'minDate', 'maxDate']) > -1) { // Decode date settings
						return plugin.determineDate(this.options[name], null,
							this.selectedDates[0], this.options.dateFormat, this.getConfig());
					}
					return this.options[name];
				},
				curMinDate: function() {
					return (this.pickingRange ? this.selectedDates[0] : this.get('minDate'));
				},
				getConfig: function() {
					return {dayNamesShort: this.options.dayNamesShort, dayNames: this.options.dayNames,
						monthNamesShort: this.options.monthNamesShort, monthNames: this.options.monthNames,
						calculateWeek: this.options.calculateWeek,
						shortYearCutoff: this.options.shortYearCutoff};
				}
			};
		},

		_postAttach: function(elem, inst) {
			if (inst.inline) {
				inst.drawDate = plugin._checkMinMax(plugin.newDate(inst.selectedDates[0] ||
					inst.get('defaultDate') || plugin.today()), inst);
				inst.prevDate = plugin.newDate(inst.drawDate);
				this._update(elem[0]);
				if ($.fn.mousewheel) {
					elem.mousewheel(this._doMouseWheel);
				}
			}
			else {
				this._attachments(elem, inst);
				elem.on('keydown.' + inst.name, this._keyDown).on('keypress.' + inst.name, this._keyPress).
					on('keyup.' + inst.name, this._keyUp);
				if (elem.attr('disabled')) {
					this.disable(elem[0]);
				}
			}
		},

		_optionsChanged: function(elem, inst, options) {
			if (options.calendar && options.calendar !== inst.options.calendar) {
				var discardDate = function(name) {
					return (typeof inst.options[name] === 'object' ? null : inst.options[name]);
				};
				options = $.extend({defaultDate: discardDate('defaultDate'),
					minDate: discardDate('minDate'), maxDate: discardDate('maxDate')}, options);
				inst.selectedDates = [];
				inst.drawDate = null;
			}
			var dates = inst.selectedDates;
			$.extend(inst.options, options);
			this.setDate(elem[0], dates, null, false, true);
			inst.pickingRange = false;
			inst.drawDate = plugin.newDate(this._checkMinMax(
				(inst.options.defaultDate ? inst.get('defaultDate') : inst.drawDate) ||
				inst.get('defaultDate') || plugin.today(), inst));
			if (!inst.inline) {
				this._attachments(elem, inst);
			}
			if (inst.inline || inst.div) {
				this._update(elem[0]);
			}
		},

		/** Attach events and trigger, if necessary.
			@private
			@param elem {jQuery} The control to affect.
			@param inst {object} The current instance settings. */
		_attachments: function(elem, inst) {
			elem.off('focus.' + inst.name);
			if (inst.options.showOnFocus) {
				elem.on('focus.' + inst.name, this.show);
			}
			if (inst.trigger) {
				inst.trigger.remove();
			}
			var trigger = inst.options.showTrigger;
			inst.trigger = (!trigger ? $([]) :
				$(trigger).clone().removeAttr('id').addClass(this._triggerClass)
					[inst.options.isRTL ? 'insertBefore' : 'insertAfter'](elem).
					click(function() {
						if (!plugin.isDisabled(elem[0])) {
							plugin[plugin.curInst === inst ? 'hide' : 'show'](elem[0]);
						}
					}));
			this._autoSize(elem, inst);
			var dates = this._extractDates(inst, elem.val());
			if (dates) {
				this.setDate(elem[0], dates, null, true);
			}
			var defaultDate = inst.get('defaultDate');
			if (inst.options.selectDefaultDate && defaultDate && inst.selectedDates.length === 0) {
				this.setDate(elem[0], plugin.newDate(defaultDate || plugin.today()));
			}
		},

		/** Apply the maximum length for the date format.
			@private
			@param elem {jQuery} The control to affect.
			@param inst {object} The current instance settings. */
		_autoSize: function(elem, inst) {
			if (inst.options.autoSize && !inst.inline) {
				var date = plugin.newDate(2009, 10, 20); // Ensure double digits
				var dateFormat = inst.options.dateFormat;
				if (dateFormat.match(/[DM]/)) {
					var findMax = function(names) {
						var max = 0;
						var maxI = 0;
						for (var i = 0; i < names.length; i++) {
							if (names[i].length > max) {
								max = names[i].length;
								maxI = i;
							}
						}
						return maxI;
					};
					date.setMonth(findMax(inst.options[dateFormat.match(/MM/) ? // Longest month
						'monthNames' : 'monthNamesShort']));
					date.setDate(findMax(inst.options[dateFormat.match(/DD/) ? // Longest day
						'dayNames' : 'dayNamesShort']) + 20 - date.getDay());
				}
				inst.elem.attr('size', plugin.formatDate(dateFormat, date, inst.getConfig()).length);
			}
		},

		_preDestroy: function(elem, inst) {
			if (inst.trigger) {
				inst.trigger.remove();
			}
			elem.empty().off('.' + inst.name);
			if (inst.inline && $.fn.mousewheel) {
				elem.unmousewheel();
			}
			if (!inst.inline && inst.options.autoSize) {
				elem.removeAttr('size');
			}
		},

		/** Apply multiple event functions.
			@param fns {function} The functions to apply.
			@example onShow: multipleEvents(fn1, fn2, ...) */
		multipleEvents: function(fns) {
			var funcs = arguments;
			return function(args) {
				for (var i = 0; i < funcs.length; i++) {
					funcs[i].apply(this, arguments);
				}
			};
		},

		/** Enable the control.
			@param elem {Element} The control to affect.
			@example $(selector).datepick('enable') */
		enable: function(elem) {
			elem = $(elem);
			if (!elem.hasClass(this._getMarker())) {
				return;
			}
			var inst = this._getInst(elem);
			if (inst.inline) {
				elem.children('.' + this._disableClass).remove().end().
					find('button,select').prop('disabled', false).end().
					find('a').attr('href', 'javascript:void(0)');
			}
			else {
				elem.prop('disabled', false);
				inst.trigger.filter('button.' + this._triggerClass).prop('disabled', false).end().
					filter('img.' + this._triggerClass).css({opacity: '1.0', cursor: ''});
			}
			this._disabled = $.map(this._disabled,
				function(value) { return (value === elem[0] ? null : value); }); // Delete entry
		},

		/** Disable the control.
			@param elem {Element} The control to affect.
			@example $(selector).datepick('disable') */
		disable: function(elem) {
			elem = $(elem);
			if (!elem.hasClass(this._getMarker())) {
				return;
			}
			var inst = this._getInst(elem);
			if (inst.inline) {
				var inline = elem.children(':last');
				var offset = inline.offset();
				var relOffset = {left: 0, top: 0};
				inline.parents().each(function() {
					if ($(this).css('position') === 'relative') {
						relOffset = $(this).offset();
						return false;
					}
				});
				var zIndex = elem.css('zIndex');
				zIndex = (zIndex === 'auto' ? 0 : parseInt(zIndex, 10)) + 1;
				elem.prepend('<div class="' + this._disableClass + '" style="' +
					'width: ' + inline.outerWidth() + 'px; height: ' + inline.outerHeight() +
					'px; left: ' + (offset.left - relOffset.left) + 'px; top: ' +
					(offset.top - relOffset.top) + 'px; z-index: ' + zIndex + '"></div>').
					find('button,select').prop('disabled', true).end().
					find('a').removeAttr('href');
			}
			else {
				elem.prop('disabled', true);
				inst.trigger.filter('button.' + this._triggerClass).prop('disabled', true).end().
					filter('img.' + this._triggerClass).css({opacity: '0.5', cursor: 'default'});
			}
			this._disabled = $.map(this._disabled,
				function(value) { return (value === elem[0] ? null : value); }); // Delete entry
			this._disabled.push(elem[0]);
		},

		/** Is the first field in a jQuery collection disabled as a datepicker?
			@param elem {Element} The control to examine.
			@return {boolean} <code>true</code> if disabled, <code>false</code> if enabled.
			@example if ($(selector).datepick('isDisabled')) {...} */
		isDisabled: function(elem) {
			return (elem && $.inArray(elem, this._disabled) > -1);
		},

		/** Show a popup datepicker.
			@param elem {Event|Element} a focus event or the control to use.
			@example $(selector).datepick('show') */
		show: function(elem) {
			elem = $(elem.target || elem);
			var inst = plugin._getInst(elem);
			if (plugin.curInst === inst) {
				return;
			}
			if (plugin.curInst) {
				plugin.hide(plugin.curInst, true);
			}
			if (!$.isEmptyObject(inst)) {
				// Retrieve existing date(s)
				inst.lastVal = null;
				inst.selectedDates = plugin._extractDates(inst, elem.val());
				inst.pickingRange = false;
				inst.drawDate = plugin._checkMinMax(plugin.newDate(inst.selectedDates[0] ||
					inst.get('defaultDate') || plugin.today()), inst);
				inst.prevDate = plugin.newDate(inst.drawDate);
				plugin.curInst = inst;
				// Generate content
				plugin._update(elem[0], true);
				// Adjust position before showing
				var offset = plugin._checkOffset(inst);
				inst.div.css({left: offset.left, top: offset.top});
				// And display
				var showAnim = inst.options.showAnim;
				var showSpeed = inst.options.showSpeed;
				showSpeed = (showSpeed === 'normal' && $.ui &&
					parseInt($.ui.version.substring(2)) >= 8 ? '_default' : showSpeed);
				if ($.effects && ($.effects[showAnim] || ($.effects.effect && $.effects.effect[showAnim]))) {
					var data = inst.div.data(); // Update old effects data
					for (var key in data) {
						if (key.match(/^ec\.storage\./)) {
							data[key] = inst._mainDiv.css(key.replace(/ec\.storage\./, ''));
						}
					}
					inst.div.data(data).show(showAnim, inst.options.showOptions, showSpeed);
				}
				else {
					inst.div[showAnim || 'show'](showAnim ? showSpeed : 0);
				}
			}
		},

		/** Extract possible dates from a string.
			@private
			@param inst {object} The current instance settings.
			@param text {string} The text to extract from.
			@return {Date[]} The extracted dates. */
		_extractDates: function(inst, datesText) {
			if (datesText === inst.lastVal) {
				return;
			}
			inst.lastVal = datesText;
			datesText = datesText.split(inst.options.multiSelect ? inst.options.multiSeparator :
				(inst.options.rangeSelect ? inst.options.rangeSeparator : '\x00'));
			var dates = [];
			for (var i = 0; i < datesText.length; i++) {
				try {
					var date = plugin.parseDate(inst.options.dateFormat, datesText[i], inst.getConfig());
					if (date) {
						var found = false;
						for (var j = 0; j < dates.length; j++) {
							if (dates[j].getTime() === date.getTime()) {
								found = true;
								break;
							}
						}
						if (!found) {
							dates.push(date);
						}
					}
				}
				catch (e) {
					// Ignore
				}
			}
			dates.splice(inst.options.multiSelect || (inst.options.rangeSelect ? 2 : 1), dates.length);
			if (inst.options.rangeSelect && dates.length === 1) {
				dates[1] = dates[0];
			}
			return dates;
		},

		/** Update the datepicker display.
			@private
			@param elem {Event|Element} a focus event or the control to use.
			@param hidden {boolean} <code>true</code> to initially hide the datepicker. */
		_update: function(elem, hidden) {
			elem = $(elem.target || elem);
			var inst = plugin._getInst(elem);
			if (!$.isEmptyObject(inst)) {
				if (inst.inline || plugin.curInst === inst) {
					if ($.isFunction(inst.options.onChangeMonthYear) && (!inst.prevDate ||
							inst.prevDate.getFullYear() !== inst.drawDate.getFullYear() ||
							inst.prevDate.getMonth() !== inst.drawDate.getMonth())) {
						inst.options.onChangeMonthYear.apply(elem[0],
							[inst.drawDate.getFullYear(), inst.drawDate.getMonth() + 1]);
					}
				}
				if (inst.inline) {
					var index = $('a, :input', elem).index($(':focus', elem));
					elem.html(this._generateContent(elem[0], inst));
					/* removed by maestrel */
					//var focus = elem.find('a, :input');
					//focus.eq(Math.max(Math.min(index, focus.length - 1), 0)).focus();
					/* end removed by maestrel */
				}
				else if (plugin.curInst === inst) {
					if (!inst.div) {
						inst.div = $('<div></div>').addClass(this._popupClass).
							css({display: (hidden ? 'none' : 'static'), position: 'absolute',
								left: elem.offset().left, top: elem.offset().top + elem.outerHeight()}).
							appendTo($(inst.options.popupContainer || 'body'));
						if ($.fn.mousewheel) {
							inst.div.mousewheel(this._doMouseWheel);
						}
					}
					inst.div.html(this._generateContent(elem[0], inst));
					elem.focus();
				}
			}
		},

		/** Update the input field and any alternate field with the current dates.
			@private
			@param elem {Element} The control to use.
			@param keyUp {boolean} <code>true</code> if coming from <code>keyUp</code> processing (internal). */
		_updateInput: function(elem, keyUp) {
			var inst = this._getInst(elem);
			if (!$.isEmptyObject(inst)) {
				var value = '';
				var altValue = '';
				var sep = (inst.options.multiSelect ? inst.options.multiSeparator :
					inst.options.rangeSeparator);
				var altFormat = inst.options.altFormat || inst.options.dateFormat;
				for (var i = 0; i < inst.selectedDates.length; i++) {
					value += (keyUp ? '' : (i > 0 ? sep : '') + plugin.formatDate(
						inst.options.dateFormat, inst.selectedDates[i], inst.getConfig()));
					altValue += (i > 0 ? sep : '') + plugin.formatDate(
						altFormat, inst.selectedDates[i], inst.getConfig());
				}
				if (!inst.inline && !keyUp) {
					$(elem).val(value);
				}
				$(inst.options.altField).val(altValue);
				if ($.isFunction(inst.options.onSelect) && !keyUp && !inst.inSelect) {
					inst.inSelect = true; // Prevent endless loops
					inst.options.onSelect.apply(elem, [inst.selectedDates]);
					inst.inSelect = false;
				}
			}
		},

		/** Retrieve the size of left and top borders for an element.
			@private
			@param elem {jQuery} The element of interest.
			@return {number[]} The left and top borders. */
		_getBorders: function(elem) {
			var convert = function(value) {
				return {thin: 1, medium: 3, thick: 5}[value] || value;
			};
			return [parseFloat(convert(elem.css('border-left-width'))),
				parseFloat(convert(elem.css('border-top-width')))];
		},

		/** Check positioning to remain on the screen.
			@private
			@param inst {object} The current instance settings.
			@return {object} The updated offset for the datepicker. */
		_checkOffset: function(inst) {
			var base = (inst.elem.is(':hidden') && inst.trigger ? inst.trigger : inst.elem);
			var offset = base.offset();
			var browserWidth = $(window).width();
			var browserHeight = $(window).height();
			if (browserWidth === 0) {
				return offset;
			}
			var isFixed = false;
			$(inst.elem).parents().each(function() {
				isFixed |= $(this).css('position') === 'fixed';
				return !isFixed;
			});
			var scrollX = document.documentElement.scrollLeft || document.body.scrollLeft;
			var scrollY = document.documentElement.scrollTop || document.body.scrollTop;
			var above = offset.top - (isFixed ? scrollY : 0) - inst.div.outerHeight();
			var below = offset.top - (isFixed ? scrollY : 0) + base.outerHeight();
			var alignL = offset.left - (isFixed ? scrollX : 0);
			var alignR = offset.left - (isFixed ? scrollX : 0) + base.outerWidth() - inst.div.outerWidth();
			var tooWide = (offset.left - scrollX + inst.div.outerWidth()) > browserWidth;
			var tooHigh = (offset.top - scrollY + inst.elem.outerHeight() +
				inst.div.outerHeight()) > browserHeight;
			inst.div.css('position', isFixed ? 'fixed' : 'absolute');
			var alignment = inst.options.alignment;
			if (alignment === 'topLeft') {
				offset = {left: alignL, top: above};
			}
			else if (alignment === 'topRight') {
				offset = {left: alignR, top: above};
			}
			else if (alignment === 'bottomLeft') {
				offset = {left: alignL, top: below};
			}
			else if (alignment === 'bottomRight') {
				offset = {left: alignR, top: below};
			}
			else if (alignment === 'top') {
				offset = {left: (inst.options.isRTL || tooWide ? alignR : alignL), top: above};
			}
			else { // bottom
				offset = {left: (inst.options.isRTL || tooWide ? alignR : alignL),
					top: (tooHigh ? above : below)};
			}
			offset.left = Math.max((isFixed ? 0 : scrollX), offset.left);
			offset.top = Math.max((isFixed ? 0 : scrollY), offset.top);
			return offset;
		},

		/** Close date picker if clicked elsewhere.
			@private
			@param event {MouseEvent} The mouse click to check. */
		_checkExternalClick: function(event) {
			if (!plugin.curInst) {
				return;
			}
			var elem = $(event.target);
			if (elem.closest('.' + plugin._popupClass + ',.' + plugin._triggerClass).length === 0 &&
					!elem.hasClass(plugin._getMarker())) {
				plugin.hide(plugin.curInst);
			}
		},

		/** Hide a popup datepicker.
			@param elem {Element|object} The control to use or the current instance settings.
			@param immediate {boolean} <code>true</code> to close immediately without animation (internal).
			@example $(selector).datepick('hide') */
		hide: function(elem, immediate) {
			if (!elem) {
				return;
			}
			var inst = this._getInst(elem);
			if ($.isEmptyObject(inst)) {
				inst = elem;
			}
			if (inst && inst === plugin.curInst) {
				var showAnim = (immediate ? '' : inst.options.showAnim);
				var showSpeed = inst.options.showSpeed;
				showSpeed = (showSpeed === 'normal' && $.ui &&
					parseInt($.ui.version.substring(2)) >= 8 ? '_default' : showSpeed);
				var postProcess = function() {
					if (!inst.div) {
						return;
					}
					inst.div.remove();
					inst.div = null;
					plugin.curInst = null;
					if ($.isFunction(inst.options.onClose)) {
						inst.options.onClose.apply(elem, [inst.selectedDates]);
					}
				};
				inst.div.stop();
				if ($.effects && ($.effects[showAnim] || ($.effects.effect && $.effects.effect[showAnim]))) {
					inst.div.hide(showAnim, inst.options.showOptions, showSpeed, postProcess);
				}
				else {
					var hideAnim = (showAnim === 'slideDown' ? 'slideUp' :
						(showAnim === 'fadeIn' ? 'fadeOut' : 'hide'));
					inst.div[hideAnim]((showAnim ? showSpeed : ''), postProcess);
				}
				if (!showAnim) {
					postProcess();
				}
			}
		},

		/** Handle keystrokes in the datepicker.
			@private
			@param event {KeyEvent} The keystroke.
			@return {boolean} <code>true</code> if not handled, <code>false</code> if handled. */
		_keyDown: function(event) {
			var elem = (event.data && event.data.elem) || event.target;
			var inst = plugin._getInst(elem);
			var handled = false;
			if (inst.inline || inst.div) {
				if (event.keyCode === 9) { // Tab - close
					plugin.hide(elem);
				}
				else if (event.keyCode === 13) { // Enter - select
					plugin.selectDate(elem,
						$('a.' + inst.options.renderer.highlightedClass, inst.div)[0]);
					handled = true;
				}
				else { // Command keystrokes
					var commands = inst.options.commands;
					for (var name in commands) {
						var command = commands[name];
						if (command.keystroke.keyCode === event.keyCode &&
								!!command.keystroke.ctrlKey === !!(event.ctrlKey || event.metaKey) &&
								!!command.keystroke.altKey === event.altKey &&
								!!command.keystroke.shiftKey === event.shiftKey) {
							plugin.performAction(elem, name);
							handled = true;
							break;
						}
					}
				}
			}
			else { // Show on 'current' keystroke
				var command = inst.options.commands.current;
				if (command.keystroke.keyCode === event.keyCode &&
						!!command.keystroke.ctrlKey === !!(event.ctrlKey || event.metaKey) &&
						!!command.keystroke.altKey === event.altKey &&
						!!command.keystroke.shiftKey === event.shiftKey) {
					plugin.show(elem);
					handled = true;
				}
			}
			inst.ctrlKey = ((event.keyCode < 48 && event.keyCode !== 32) || event.ctrlKey || event.metaKey);
			if (handled) {
				event.preventDefault();
				event.stopPropagation();
			}
			return !handled;
		},

		/** Filter keystrokes in the datepicker.
			@private
			@param event {KeyEvent} The keystroke.
			@return {boolean} <code>true</code> if allowed, <code>false</code> if not allowed. */
		_keyPress: function(event) {
			var inst = plugin._getInst((event.data && event.data.elem) || event.target);
			if (!$.isEmptyObject(inst) && inst.options.constrainInput) {
				var ch = String.fromCharCode(event.keyCode || event.charCode);
				var allowedChars = plugin._allowedChars(inst);
				return (event.metaKey || inst.ctrlKey || ch < ' ' ||
					!allowedChars || allowedChars.indexOf(ch) > -1);
			}
			return true;
		},

		/** Determine the set of characters allowed by the date format.
			@private
			@param inst {object} The current instance settings.
			@return {string} The set of allowed characters, or <code>null</code> if anything allowed. */
		_allowedChars: function(inst) {
			var allowedChars = (inst.options.multiSelect ? inst.options.multiSeparator :
				(inst.options.rangeSelect ? inst.options.rangeSeparator : ''));
			var literal = false;
			var hasNum = false;
			var dateFormat = inst.options.dateFormat;
			for (var i = 0; i < dateFormat.length; i++) {
				var ch = dateFormat.charAt(i);
				if (literal) {
					if (ch === "'" && dateFormat.charAt(i + 1) !== "'") {
						literal = false;
					}
					else {
						allowedChars += ch;
					}
				}
				else {
					switch (ch) {
						case 'd': case 'm': case 'o': case 'w':
							allowedChars += (hasNum ? '' : '0123456789'); hasNum = true; break;
						case 'y': case '@': case '!':
							allowedChars += (hasNum ? '' : '0123456789') + '-'; hasNum = true; break;
						case 'J':
							allowedChars += (hasNum ? '' : '0123456789') + '-.'; hasNum = true; break;
						case 'D': case 'M': case 'Y':
							return null; // Accept anything
						case "'":
							if (dateFormat.charAt(i + 1) === "'") {
								allowedChars += "'";
							}
							else {
								literal = true;
							}
							break;
						default:
							allowedChars += ch;
					}
				}
			}
			return allowedChars;
		},

		/** Synchronise datepicker with the field.
			@private
			@param event {KeyEvent} The keystroke.
			@return {boolean} <code>true</code> if allowed, <code>false</code> if not allowed. */
		_keyUp: function(event) {
			var elem = (event.data && event.data.elem) || event.target;
			var inst = plugin._getInst(elem);
			if (!$.isEmptyObject(inst) && !inst.ctrlKey && inst.lastVal !== inst.elem.val()) {
				try {
					var dates = plugin._extractDates(inst, inst.elem.val());
					if (dates.length > 0) {
						plugin.setDate(elem, dates, null, true);
					}
				}
				catch (event) {
					// Ignore
				}
			}
			return true;
		},

		/** Increment/decrement month/year on mouse wheel activity.
			@private
			@param event {event} The mouse wheel event.
			@param delta {number} The amount of change. */
		_doMouseWheel: function(event, delta) {
			var elem = (plugin.curInst && plugin.curInst.elem[0]) ||
				$(event.target).closest('.' + plugin._getMarker())[0];
			if (plugin.isDisabled(elem)) {
				return;
			}
			var inst = plugin._getInst(elem);
			if (inst.options.useMouseWheel) {
				delta = (delta < 0 ? -1 : +1);
				plugin.changeMonth(elem, -inst.options[event.ctrlKey ? 'monthsToJump' : 'monthsToStep'] * delta);
				event.preventDefault(); // added by maestrel
			}
			// removed by maestrel
			// event.preventDefault();
		},

		/** Clear an input and close a popup datepicker.
			@param elem {Element} The control to use.
			@example $(selector).datepick('clear') */
		clear: function(elem) {
			var inst = this._getInst(elem);
			if (!$.isEmptyObject(inst)) {
				inst.selectedDates = [];
				this.hide(elem);
				var defaultDate = inst.get('defaultDate');
				if (inst.options.selectDefaultDate && defaultDate) {
					this.setDate(elem, plugin.newDate(defaultDate || plugin.today()));
				}
				else {
					this._updateInput(elem);
				}
			}
		},

		/** Retrieve the selected date(s) for a datepicker.
			@param elem {Element} The control to examine.
			@return {Date[]} The selected date(s).
			@example var dates = $(selector).datepick('getDate') */
		getDate: function(elem) {
			var inst = this._getInst(elem);
			return (!$.isEmptyObject(inst) ? inst.selectedDates : []);
		},

		/** Set the selected date(s) for a datepicker.
			@param elem {Element} the control to examine.
			@param dates {Date|number|string|array} the selected date(s).
			@param [endDate] {Date|number|string} the ending date for a range.
			@param keyUp {boolean} <code>true</code> if coming from <code>keyUp</code> processing (internal).
			@param setOpt {boolean} <code>true</code> if coming from option processing (internal).
			@example $(selector).datepick('setDate', new Date(2014, 12-1, 25))
 $(selector).datepick('setDate', '12/25/2014', '01/01/2015')
 $(selector).datepick('setDate', [date1, date2, date3]) */
		setDate: function(elem, dates, endDate, keyUp, setOpt) {
			var inst = this._getInst(elem);
			if (!$.isEmptyObject(inst)) {
				if (!$.isArray(dates)) {
					dates = [dates];
					if (endDate) {
						dates.push(endDate);
					}
				}
				var minDate = inst.get('minDate');
				var maxDate = inst.get('maxDate');
				var curDate = inst.selectedDates[0];
				inst.selectedDates = [];
				for (var i = 0; i < dates.length; i++) {
					var date = plugin.determineDate(
						dates[i], null, curDate, inst.options.dateFormat, inst.getConfig());
					if (date) {
						if ((!minDate || date.getTime() >= minDate.getTime()) &&
								(!maxDate || date.getTime() <= maxDate.getTime())) {
							var found = false;
							for (var j = 0; j < inst.selectedDates.length; j++) {
								if (inst.selectedDates[j].getTime() === date.getTime()) {
									found = true;
									break;
								}
							}
							if (!found) {
								inst.selectedDates.push(date);
							}
						}
					}
				}
				inst.selectedDates.splice(inst.options.multiSelect ||
					(inst.options.rangeSelect ? 2 : 1), inst.selectedDates.length);
				if (inst.options.rangeSelect) {
					switch (inst.selectedDates.length) {
						case 1: inst.selectedDates[1] = inst.selectedDates[0]; break;
						case 2: inst.selectedDates[1] =
							(inst.selectedDates[0].getTime() > inst.selectedDates[1].getTime() ?
							inst.selectedDates[0] : inst.selectedDates[1]); break;
					}
					inst.pickingRange = false;
				}
				inst.prevDate = (inst.drawDate ? plugin.newDate(inst.drawDate) : null);
				inst.drawDate = this._checkMinMax(plugin.newDate(inst.selectedDates[0] ||
					inst.get('defaultDate') || plugin.today()), inst);
				if (!setOpt) {
					this._update(elem);
					this._updateInput(elem, keyUp);
				}
			}
		},

		/** Determine whether a date is selectable for this datepicker.
			@private
			@param elem {Element} The control to check.
			@param date {Date|string|number} The date to check.
			@return {boolean} <code>true</code> if selectable, <code>false</code> if not.
			@example var selectable = $(selector).datepick('isSelectable', date) */
		isSelectable: function(elem, date) {
			var inst = this._getInst(elem);
			if ($.isEmptyObject(inst)) {
				return false;
			}
			date = plugin.determineDate(date, inst.selectedDates[0] || this.today(), null,
				inst.options.dateFormat, inst.getConfig());
			return this._isSelectable(elem, date, inst.options.onDate,
				inst.get('minDate'), inst.get('maxDate'));
		},

		/** Internally determine whether a date is selectable for this datepicker.
			@private
			@param elem {Element} the control to check.
			@param date {Date} The date to check.
			@param onDate {function|boolean} Any onDate callback or callback.selectable.
			@param minDate {Date} The minimum allowed date.
			@param maxDate {Date} The maximum allowed date.
			@return {boolean} <code>true</code> if selectable, <code>false</code> if not. */
		_isSelectable: function(elem, date, onDate, minDate, maxDate) {
			var dateInfo = (typeof onDate === 'boolean' ? {selectable: onDate} :
				(!$.isFunction(onDate) ? {} : onDate.apply(elem, [date, true])));
			return (dateInfo.selectable !== false) &&
				(!minDate || date.getTime() >= minDate.getTime()) &&
				(!maxDate || date.getTime() <= maxDate.getTime());
		},

		/** Perform a named action for a datepicker.
			@param elem {element} The control to affect.
			@param action {string} The name of the action. */
		performAction: function(elem, action) {
			var inst = this._getInst(elem);
			if (!$.isEmptyObject(inst) && !this.isDisabled(elem)) {
				var commands = inst.options.commands;
				if (commands[action] && commands[action].enabled.apply(elem, [inst])) {
					commands[action].action.apply(elem, [inst]);
				}
			}
		},

		/** Set the currently shown month, defaulting to today's.
			@param elem {Element} The control to affect.
			@param [year] {number} The year to show.
			@param [month] {number} The month to show (1-12).
			@param [day] {number} The day to show.
			@example $(selector).datepick('showMonth', 2014, 12, 25) */
		showMonth: function(elem, year, month, day) {
			var inst = this._getInst(elem);
			if (!$.isEmptyObject(inst) && (day != null ||
					(inst.drawDate.getFullYear() !== year || inst.drawDate.getMonth() + 1 !== month))) {
				inst.prevDate = plugin.newDate(inst.drawDate);
				var show = this._checkMinMax((year != null ?
					plugin.newDate(year, month, 1) : plugin.today()), inst);
				inst.drawDate = plugin.newDate(show.getFullYear(), show.getMonth() + 1,
					(day != null ? day : Math.min(inst.drawDate.getDate(),
					plugin.daysInMonth(show.getFullYear(), show.getMonth() + 1))));
				this._update(elem);
			}
		},

		/** Adjust the currently shown month.
			@param elem {Element} The control to affect.
			@param offset {number} The number of months to change by.
			@example $(selector).datepick('changeMonth', 2)*/
		changeMonth: function(elem, offset) {
			var inst = this._getInst(elem);
			if (!$.isEmptyObject(inst)) {
				var date = plugin.add(plugin.newDate(inst.drawDate), offset, 'm');
				this.showMonth(elem, date.getFullYear(), date.getMonth() + 1);
			}
		},

		/** Adjust the currently shown day.
			@param elem {Element} The control to affect.
			@param offset {number} The number of days to change by.
			@example $(selector).datepick('changeDay', 7)*/
		changeDay: function(elem, offset) {
			var inst = this._getInst(elem);
			if (!$.isEmptyObject(inst)) {
				var date = plugin.add(plugin.newDate(inst.drawDate), offset, 'd');
				this.showMonth(elem, date.getFullYear(), date.getMonth() + 1, date.getDate());
			}
		},

		/** Restrict a date to the minimum/maximum specified.
			@private
			@param date {Date} The date to check.
			@param inst {object} The current instance settings. */
		_checkMinMax: function(date, inst) {
			var minDate = inst.get('minDate');
			var maxDate = inst.get('maxDate');
			date = (minDate && date.getTime() < minDate.getTime() ? plugin.newDate(minDate) : date);
			date = (maxDate && date.getTime() > maxDate.getTime() ? plugin.newDate(maxDate) : date);
			return date;
		},

		/** Retrieve the date associated with an entry in the datepicker.
			@param elem {Element} The control to examine.
			@param target {Element} The selected datepicker element.
			@return {Date} The corresponding date, or <code>null</code>.
			@example var date = $(selector).datepick('retrieveDate', $('div.datepick-popup a:contains(10)')[0]) */
		retrieveDate: function(elem, target) {
			var inst = this._getInst(elem);
			return ($.isEmptyObject(inst) ? null : this._normaliseDate(
				new Date(parseInt(target.className.replace(/^.*dp(-?\d+).*$/, '$1'), 10))));
		},

		/** Select a date for this datepicker.
			@param elem {Element} The control to examine.
			@param target {Element} The selected datepicker element.
			@example $(selector).datepick('selectDate', $('div.datepick-popup a:contains(10)')[0]) */
		selectDate: function(elem, target) {
			var inst = this._getInst(elem);
			if (!$.isEmptyObject(inst) && !this.isDisabled(elem)) {
				var date = this.retrieveDate(elem, target);
				if (inst.options.multiSelect) {
					var found = false;
					for (var i = 0; i < inst.selectedDates.length; i++) {
						if (date.getTime() === inst.selectedDates[i].getTime()) {
							inst.selectedDates.splice(i, 1);
							found = true;
							break;
						}
					}
					if (!found && inst.selectedDates.length < inst.options.multiSelect) {
						inst.selectedDates.push(date);
					}
				}
				else if (inst.options.rangeSelect) {
					if (inst.pickingRange) {
						inst.selectedDates[1] = date;
					}
					else {
						inst.selectedDates = [date, date];
					}
					inst.pickingRange = !inst.pickingRange;
				}
				else {
					inst.selectedDates = [date];
				}
				inst.prevDate = inst.drawDate = plugin.newDate(date);
				this._updateInput(elem);
				if (inst.inline || inst.pickingRange || inst.selectedDates.length <
						(inst.options.multiSelect || (inst.options.rangeSelect ? 2 : 1))) {
					this._update(elem);
				}
				else {
					this.hide(elem);
				}
			}
		},

		/** Generate the datepicker content for this control.
			@private
			@param elem {Element} The control to affect.
			@param inst {object} The current instance settings.
			@return {jQuery} The datepicker content */
		_generateContent: function(elem, inst) {
			var monthsToShow = inst.options.monthsToShow;
			monthsToShow = ($.isArray(monthsToShow) ? monthsToShow : [1, monthsToShow]);
			inst.drawDate = this._checkMinMax(
				inst.drawDate || inst.get('defaultDate') || plugin.today(), inst);
			var drawDate = plugin._applyMonthsOffset(plugin.newDate(inst.drawDate), inst);
			// Generate months
			var monthRows = '';
			for (var row = 0; row < monthsToShow[0]; row++) {
				var months = '';
				for (var col = 0; col < monthsToShow[1]; col++) {
					months += this._generateMonth(elem, inst, drawDate.getFullYear(),
						drawDate.getMonth() + 1, inst.options.renderer, (row === 0 && col === 0));
					plugin.add(drawDate, 1, 'm');
				}
				monthRows += this._prepare(inst.options.renderer.monthRow, inst).replace(/\{months\}/, months);
			}
			var picker = this._prepare(inst.options.renderer.picker, inst).replace(/\{months\}/, monthRows).
				replace(/\{weekHeader\}/g, this._generateDayHeaders(inst, inst.options.renderer));
			// Add commands
			var addCommand = function(type, open, close, name, classes) {
				if (picker.indexOf('{' + type + ':' + name + '}') === -1) {
					return;
				}
				var command = inst.options.commands[name];
				var date = (inst.options.commandsAsDateFormat ? command.date.apply(elem, [inst]) : null);
				picker = picker.replace(new RegExp('\\{' + type + ':' + name + '\\}', 'g'),
					'<' + open + (command.status ? ' title="' + inst.options[command.status] + '"' : '') +
					' class="' + inst.options.renderer.commandClass + ' ' +
					inst.options.renderer.commandClass + '-' + name + ' ' + classes +
					(command.enabled(inst) ? '' : ' ' + inst.options.renderer.disabledClass) + '">' +
					(date ? plugin.formatDate(inst.options[command.text], date, inst.getConfig()) :
					inst.options[command.text]) + '</' + close + '>');
			};
			for (var name in inst.options.commands) {
				addCommand('button', 'button type="button"', 'button', name,
					inst.options.renderer.commandButtonClass);
				addCommand('link', 'a href="javascript:void(0)"', 'a', name,
					inst.options.renderer.commandLinkClass);
			}
			picker = $(picker);
			if (monthsToShow[1] > 1) {
				var count = 0;
				$(inst.options.renderer.monthSelector, picker).each(function() {
					var nth = ++count % monthsToShow[1];
					$(this).addClass(nth === 1 ? 'first' : (nth === 0 ? 'last' : ''));
				});
			}
			// Add datepicker behaviour
			var self = this;
			function removeHighlight() {
				(inst.inline ? $(this).closest('.' + self._getMarker()) : inst.div).
					find(inst.options.renderer.daySelector + ' a').
					removeClass(inst.options.renderer.highlightedClass);
			}
			picker.find(inst.options.renderer.daySelector + ' a').hover(
					function() {
						removeHighlight.apply(this);
						$(this).addClass(inst.options.renderer.highlightedClass);
					},
					removeHighlight).
				click(function() {
					self.selectDate(elem, this);
				}).end().
				find('select.' + this._monthYearClass + ':not(.' + this._anyYearClass + ')').
				change(function() {
					var monthYear = $(this).val().split('/');
					self.showMonth(elem, parseInt(monthYear[1], 10), parseInt(monthYear[0], 10));
				}).end().
				find('select.' + this._anyYearClass).click(function() {
					$(this).css('visibility', 'hidden').
						next('input').css({left: this.offsetLeft, top: this.offsetTop,
						width: this.offsetWidth, height: this.offsetHeight}).show().focus();
				}).end().
				find('input.' + self._monthYearClass).change(function() {
					try {
						var year = parseInt($(this).val(), 10);
						year = (isNaN(year) ? inst.drawDate.getFullYear() : year);
						self.showMonth(elem, year, inst.drawDate.getMonth() + 1, inst.drawDate.getDate());
					}
					catch (e) {
						alert(e);
					}
				}).keydown(function(event) {
					if (event.keyCode === 13) { // Enter
						$(event.elem).change();
					}
					else if (event.keyCode === 27) { // Escape
						$(event.elem).hide().prev('select').css('visibility', 'visible');
						inst.elem.focus();
					}
				});
			// Add keyboard handling
			var data = {elem: inst.elem[0]};
			picker.keydown(data, this._keyDown).keypress(data, this._keyPress).keyup(data, this._keyUp);
			// Add command behaviour
			picker.find('.' + inst.options.renderer.commandClass).click(function() {
					if (!$(this).hasClass(inst.options.renderer.disabledClass)) {
						var action = this.className.replace(
							new RegExp('^.*' + inst.options.renderer.commandClass + '-([^ ]+).*$'), '$1');
						plugin.performAction(elem, action);
					}
				});
			// Add classes
			if (inst.options.isRTL) {
				picker.addClass(inst.options.renderer.rtlClass);
			}
			if (monthsToShow[0] * monthsToShow[1] > 1) {
				picker.addClass(inst.options.renderer.multiClass);
			}
			if (inst.options.pickerClass) {
				picker.addClass(inst.options.pickerClass);
			}
			// Resize
			$('body').append(picker);
			var width = 0;
			picker.find(inst.options.renderer.monthSelector).each(function() {
				width += $(this).outerWidth();
			});
			picker.width(width / monthsToShow[0]);
			// Pre-show customisation
			if ($.isFunction(inst.options.onShow)) {
				inst.options.onShow.apply(elem, [picker, inst]);
			}
			return picker;
		},

		/** Generate the content for a single month.
			@private
			@param elem {Element} The control to affect.
			@param inst {object} The current instance settings.
			@param year {number} The year to generate.
			@param month {number} The month to generate.
			@param renderer {object} The rendering templates.
			@param first {boolean} <code>true</code> if first of multiple months.
			@return {string} The month content. */
		_generateMonth: function(elem, inst, year, month, renderer, first) {
			var daysInMonth = plugin.daysInMonth(year, month);
			var monthsToShow = inst.options.monthsToShow;
			monthsToShow = ($.isArray(monthsToShow) ? monthsToShow : [1, monthsToShow]);
			var fixedWeeks = inst.options.fixedWeeks || (monthsToShow[0] * monthsToShow[1] > 1);
			var firstDay = inst.options.firstDay;
			var leadDays = (plugin.newDate(year, month, 1).getDay() - firstDay + 7) % 7;
			var numWeeks = (fixedWeeks ? 6 : Math.ceil((leadDays + daysInMonth) / 7));
			var selectOtherMonths = inst.options.selectOtherMonths && inst.options.showOtherMonths;
			var minDate = (inst.pickingRange ? inst.selectedDates[0] : inst.get('minDate'));
			var maxDate = inst.get('maxDate');
			var showWeeks = renderer.week.indexOf('{weekOfYear}') > -1;
			var today = plugin.today();
			var drawDate = plugin.newDate(year, month, 1);
			plugin.add(drawDate, -leadDays - (fixedWeeks && (drawDate.getDay() === firstDay) ? 7 : 0), 'd');
			var ts = drawDate.getTime();
			// Generate weeks
			var weeks = '';
			for (var week = 0; week < numWeeks; week++) {
				var weekOfYear = (!showWeeks ? '' : '<span class="dp' + ts + '">' +
					($.isFunction(inst.options.calculateWeek) ? inst.options.calculateWeek(drawDate) : 0) + '</span>');
				var days = '';
				for (var day = 0; day < 7; day++) {
					var selected = false;
					if (inst.options.rangeSelect && inst.selectedDates.length > 0) {
						selected = (drawDate.getTime() >= inst.selectedDates[0] &&
							drawDate.getTime() <= inst.selectedDates[1]);
					}
					else {
						for (var i = 0; i < inst.selectedDates.length; i++) {
							if (inst.selectedDates[i].getTime() === drawDate.getTime()) {
								selected = true;
								break;
							}
						}
					}
					var dateInfo = (!$.isFunction(inst.options.onDate) ? {} :
						inst.options.onDate.apply(elem, [drawDate, drawDate.getMonth() + 1 === month]));
					var selectable = (selectOtherMonths || drawDate.getMonth() + 1 === month) &&
						this._isSelectable(elem, drawDate, dateInfo.selectable, minDate, maxDate);
					days += this._prepare(renderer.day, inst).replace(/\{day\}/g,
						(selectable ? '<a href="javascript:void(0)"' : '<span') +
						' class="dp' + ts + ' ' + (dateInfo.dateClass || '') +
						(selected && (selectOtherMonths || drawDate.getMonth() + 1 === month) ?
						' ' + renderer.selectedClass : '') +
						(selectable ? ' ' + renderer.defaultClass : '') +
						((drawDate.getDay() || 7) < 6 ? '' : ' ' + renderer.weekendClass) +
						(drawDate.getMonth() + 1 === month ? '' : ' ' + renderer.otherMonthClass) +
						(drawDate.getTime() === today.getTime() && (drawDate.getMonth() + 1) === month ?
						' ' + renderer.todayClass : '') +
						(drawDate.getTime() === inst.drawDate.getTime() && (drawDate.getMonth() + 1) === month ?
						' ' + renderer.highlightedClass : '') + '"' +
						(dateInfo.title || (inst.options.dayStatus && selectable) ? ' title="' +
						(dateInfo.title || plugin.formatDate(
						inst.options.dayStatus, drawDate, inst.getConfig())) + '"' : '') + '>' +
						(inst.options.showOtherMonths || (drawDate.getMonth() + 1) === month ?
						dateInfo.content || drawDate.getDate() : '&#160;') +
						(selectable ? '</a>' : '</span>'));
					plugin.add(drawDate, 1, 'd');
					ts = drawDate.getTime();
				}
				weeks += this._prepare(renderer.week, inst).replace(/\{days\}/g, days).
					replace(/\{weekOfYear\}/g, weekOfYear);
			}
			var monthHeader = this._prepare(renderer.month, inst).match(/\{monthHeader(:[^\}]+)?\}/);
			monthHeader = (monthHeader[0].length <= 13 ? 'MM yyyy' :
				monthHeader[0].substring(13, monthHeader[0].length - 1));
			monthHeader = (first ? this._generateMonthSelection(
				inst, year, month, minDate, maxDate, monthHeader, renderer) :
				plugin.formatDate(monthHeader, plugin.newDate(year, month, 1), inst.getConfig()));
			var weekHeader = this._prepare(renderer.weekHeader, inst).
				replace(/\{days\}/g, this._generateDayHeaders(inst, renderer));
			return this._prepare(renderer.month, inst).replace(/\{monthHeader(:[^\}]+)?\}/g, monthHeader).
				replace(/\{weekHeader\}/g, weekHeader).replace(/\{weeks\}/g, weeks);
		},

		/** Generate the HTML for the day headers.
			@private
			@param inst {object} The current instance settings.
			@param renderer {object} The rendering templates.
			@return {string} A week's worth of day headers. */
		_generateDayHeaders: function(inst, renderer) {
			var header = '';
			for (var day = 0; day < 7; day++) {
				var dow = (day + inst.options.firstDay) % 7;
				header += this._prepare(renderer.dayHeader, inst).replace(/\{day\}/g,
					'<span class="' + this._curDoWClass + dow + '" title="' +
					inst.options.dayNames[dow] + '">' + inst.options.dayNamesMin[dow] + '</span>');
			}
			return header;
		},

		/** Generate selection controls for month.
			@private
			@param inst {object} The current instance settings.
			@param year {number} The year to generate.
			@param month {number} The month to generate.
			@param minDate {Date} The minimum date allowed.
			@param maxDate {Date} The maximum date allowed.
			@param monthHeader {string} The month/year format.
			@return {string} The month selection content. */
		_generateMonthSelection: function(inst, year, month, minDate, maxDate, monthHeader) {
			if (!inst.options.changeMonth) {
				return plugin.formatDate(
					monthHeader, plugin.newDate(year, month, 1), inst.getConfig());
			}
			// Months
			var monthNames = inst.options['monthNames' + (monthHeader.match(/mm/i) ? '' : 'Short')];
			var html = monthHeader.replace(/m+/i, '\\x2E').replace(/y+/i, '\\x2F');
			var selector = '<select class="' + this._monthYearClass +
				'" title="' + inst.options.monthStatus + '">';
			for (var m = 1; m <= 12; m++) {
				if ((!minDate || plugin.newDate(year, m, plugin.daysInMonth(year, m)).
						getTime() >= minDate.getTime()) &&
						(!maxDate || plugin.newDate(year, m, 1).getTime() <= maxDate.getTime())) {
					selector += '<option value="' + m + '/' + year + '"' +
						(month === m ? ' selected="selected"' : '') + '>' +
						monthNames[m - 1] + '</option>';
				}
			}
			selector += '</select>';
			html = html.replace(/\\x2E/, selector);
			// Years
			var yearRange = inst.options.yearRange;
			if (yearRange === 'any') {
				selector = '<select class="' + this._monthYearClass + ' ' + this._anyYearClass +
					'" title="' + inst.options.yearStatus + '">' +
					'<option>' + year + '</option></select>' +
					'<input class="' + this._monthYearClass + ' ' + this._curMonthClass +
					month + '" value="' + year + '">';
			}
			else {
				yearRange = yearRange.split(':');
				var todayYear = plugin.today().getFullYear();
				var start = (yearRange[0].match('c[+-].*') ? year + parseInt(yearRange[0].substring(1), 10) :
					((yearRange[0].match('[+-].*') ? todayYear : 0) + parseInt(yearRange[0], 10)));
				var end = (yearRange[1].match('c[+-].*') ? year + parseInt(yearRange[1].substring(1), 10) :
					((yearRange[1].match('[+-].*') ? todayYear : 0) + parseInt(yearRange[1], 10)));
				selector = '<select class="' + this._monthYearClass +
					'" title="' + inst.options.yearStatus + '">';
				start = plugin.add(plugin.newDate(start + 1, 1, 1), -1, 'd');
				end = plugin.newDate(end, 1, 1);
				var addYear = function(y, yDisplay) {
					if (y !== 0) {
						selector += '<option value="' + month + '/' + y + '"' +
							(year === y ? ' selected="selected"' : '') + '>' + (yDisplay || y) + '</option>';
					}
				};
				if (start.getTime() < end.getTime()) {
					start = (minDate && minDate.getTime() > start.getTime() ? minDate : start).getFullYear();
					end = (maxDate && maxDate.getTime() < end.getTime() ? maxDate : end).getFullYear();
					var earlierLater = Math.floor((end - start) / 2);
					if (!minDate || minDate.getFullYear() < start) {
						addYear(start - earlierLater, inst.options.earlierText);
					}
					for (var y = start; y <= end; y++) {
						addYear(y);
					}
					if (!maxDate || maxDate.getFullYear() > end) {
						addYear(end + earlierLater, inst.options.laterText);
					}
				}
				else {
					start = (maxDate && maxDate.getTime() < start.getTime() ? maxDate : start).getFullYear();
					end = (minDate && minDate.getTime() > end.getTime() ? minDate : end).getFullYear();
					var earlierLater = Math.floor((start - end) / 2);
					if (!maxDate || maxDate.getFullYear() > start) {
						addYear(start + earlierLater, inst.options.earlierText);
					}
					for (var y = start; y >= end; y--) {
						addYear(y);
					}
					if (!minDate || minDate.getFullYear() < end) {
						addYear(end - earlierLater, inst.options.laterText);
					}
				}
				selector += '</select>';
			}
			html = html.replace(/\\x2F/, selector);
			return html;
		},

		/** Prepare a render template for use.
			Exclude popup/inline sections that are not applicable.
			Localise text of the form: {l10n:name}.
			@private
			@param text {string} The text to localise.
			@param inst {object} The current instance settings.
			@return {string} The localised text. */
		_prepare: function(text, inst) {
			var replaceSection = function(type, retain) {
				while (true) {
					var start = text.indexOf('{' + type + ':start}');
					if (start === -1) {
						return;
					}
					var end = text.substring(start).indexOf('{' + type + ':end}');
					if (end > -1) {
						text = text.substring(0, start) +
							(retain ? text.substr(start + type.length + 8, end - type.length - 8) : '') +
							text.substring(start + end + type.length + 6);
					}
				}
			};
			replaceSection('inline', inst.inline);
			replaceSection('popup', !inst.inline);
			var pattern = /\{l10n:([^\}]+)\}/;
			var matches = null;
			while (matches = pattern.exec(text)) {
				text = text.replace(matches[0], inst.options[matches[1]]);
			}
			return text;
		}
	});

	var plugin = $.datepick; // Singleton instance

	$(function() {
		$(document).on('mousedown.' + pluginName, plugin._checkExternalClick).
			on('resize.' + pluginName, function() { plugin.hide(plugin.curInst); });
	});

})(jQuery);
