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/*! http://keith-wood.name/countdown.html
	Countdown for jQuery v2.1.0.
	Written by Keith Wood (wood.keith{at}optusnet.com.au) January 2008.
	Available under the MIT (http://keith-wood.name/licence.html) license. 
	Please attribute the author if you use it. */

(function($) { // Hide scope, no $ conflict
	'use strict';

	var pluginName = 'countdown';

	var Y = 0; // Years
	var O = 1; // Months
	var W = 2; // Weeks
	var D = 3; // Days
	var H = 4; // Hours
	var M = 5; // Minutes
	var S = 6; // Seconds

	/** Create the countdown plugin.
		<p>Sets an element to show the time remaining until a given instant.</p>
		<p>Expects HTML like:</p>
		<pre>&lt;div>&lt;/div></pre>
		<p>Provide inline configuration like:</p>
		<pre>&lt;div data-countdown="name: 'value', ...">&lt;/div></pre>
		@module Countdown
		@augments JQPlugin
		@example $(selector).countdown({until: +300}) */
	$.JQPlugin.createPlugin({
	
		/** The name of the plugin.
			@default 'countdown' */
		name: pluginName,

		/** Countdown expiry callback.
			Used with the {@linkcode module:Countdown~defaultOptions|onExpiry} option and
			triggered when the countdown expires.
			@global
			@callback CountdownExpiryCallback
			@this <code>Element</code>
			@example onExpiry: function() {
  alert('Done');
} */

		/** Countdown server synchronisation callback.
			Used with the {@linkcode module:Countdown~defaultOptions|serverSync} option and
			triggered when the countdown is initialised.
			@global
			@callback CountdownServerSyncCallback
			@return {Date} The current date/time on the server as expressed in the local timezone.
			@this <code>$.countdown</code>
			@example serverSync: function() {
  var time = null;
  $.ajax({url: 'http://myserver.com/serverTime.php',
    async: false, dataType: 'text',
    success: function(text) {
      time = new Date(text);
    }, error: function(http, message, exc) {
      time = new Date();
  });
  return time;
} */
			
		/** Countdown tick callback.
			Used with the {@linkcode module:Countdown~defaultOptions|onTick} option and
			triggered on every {@linkcode module:Countdown~defaultOptions|tickInterval} ticks of the countdown.
			@global
			@callback CountdownTickCallback
			@this <code>Element</code>
			@param {number[]} periods The breakdown by period (years, months, weeks, days,
					hours, minutes, seconds) of the time remaining/passed.
			@example onTick: function(periods) {
  $('#altTime').text(periods[4] + ':' + twoDigits(periods[5]) +
    ':' + twoDigits(periods[6]));
} */

		/** Countdown which labels callback.
			Used with the {@linkcode module:Countdown~regionalOptions|whichLabels} option and
			triggered when the countdown is being display to determine which set of labels
			(<code>labels</code>, <code>labels1</code>, ...) are to be used for the current period value.
			@global
			@callback CountdownWhichLabelsCallback
			@param {number} num The current period value.
			@return {number} The suffix for the label set to use, or zero for the default labels.
			@example whichLabels: function(num) {
  return (num === 1 ? 1 : (num >= 2 && num <= 4 ? 2 : 0));
} */
			
		/** Default settings for the plugin.
			@property {Date|number|string} [until] The date/time to count down to, or number of seconds
						offset from now, or string of amounts and units for offset(s) from now:
						'Y' years, 'O' months, 'W' weeks, 'D' days, 'H' hours, 'M' minutes, 'S' seconds.
						One of <code>until</code> or <code>since</code> must be specified.
						If both are given <code>since</code> takes precedence.
			@example until: new Date(2013, 12-1, 25, 13, 30)
until: +300
until: '+1O -2D'
			@property {Date|number|string} [since] The date/time to count up from, or number of seconds
						offset from now, or string of amounts and units for offset(s) from now:
						'Y' years, 'O' months, 'W' weeks, 'D' days, 'H' hours, 'M' minutes, 'S' seconds.
						One of <code>until</code> or <code>since</code> must be specified.
						If both are given <code>since</code> takes precedence.
			@example since: new Date(2013, 1-1, 1)
since: -300
since: '-1O +2D'
			@property {number} [timezone=null] The timezone (hours or minutes from GMT) for the target times,
						or <code>null</code> for client local timezone.
			@example timezone: +10
timezone: -60
			@property {CountdownServerSyncCallback} [serverSync=null] A function to retrieve the current server time
						for synchronisation.
			@property {string} [format='dHMS'] The format for display - upper case to always show,
						lower case to show only if non-zero,
						'Y' years, 'O' months, 'W' weeks, 'D' days, 'H' hours, 'M' minutes, 'S' seconds.
			@property {string} [layout=''] <p>Build your own layout for the countdown.</p>
						<p>Indicate substitution points with '{desc}' for the description, '{sep}' for the time separator,
						'{pv}' where p is 'y' for years, 'o' for months, 'w' for weeks, 'd' for days,
						'h' for hours, 'm' for minutes, or 's' for seconds and v is 'n' for the period value,
						'nn' for the period value with a minimum of two digits,
						'nnn' for the period value with a minimum of three digits, or
						'l' for the period label (long or short form depending on the compact setting), or
						'{pd}' where p is as above and d is '1' for the units digit, '10' for the tens digit,
						'100' for the hundreds digit, or '1000' for the thousands digit.</p>
						<p>If you need to exclude entire sections when the period value is zero and
						you have specified the period as optional, surround these sections with
						'{p<}' and '{p>}', where p is the same as above.</p>
						<p>Your layout can just be simple text, or can contain HTML markup as well.</p>
			@example layout: '{d<}{dn} {dl}{d>} {hnn}:{mnn}:{snn}'
			@property {boolean} [compact=false] <code>true</code> to display in a compact format,
						<code>false</code> for an expanded one.
			@property {boolean} [padZeroes=false] <code>true</code> to add leading zeroes.
			@property {number} [significant=0] The maximum number of periods with non-zero values to show, zero for all.
			@property {string} [description=''] The description displayed for the countdown.
			@property {string} [expiryUrl=''] A URL to load upon expiry, replacing the current page.
			@property {string} [expiryText=''] Text to display upon expiry, replacing the countdown. This may be HTML.
			@property {boolean} [alwaysExpire=false] <code>true</code> to trigger <code>onExpiry</code>
						even if the target time has passed.
			@property {CountdownExpiryCallback} [onExpiry=null] Callback when the countdown expires -
						receives no parameters and <code>this</code> is the containing element.
			@example onExpiry: function() {
  ...
}
			@property {CountdownTickCallback} [onTick=null] Callback when the countdown is updated -
						receives <code>number[7]</code> being the breakdown by period
						(years, months, weeks, days, hours, minutes, seconds - based on
						<code>format</code>) and <code>this</code> is the containing element.
			@example onTick: function(periods) {
  var secs = $.countdown.periodsToSeconds(periods);
  if (secs < 300) { // Last five minutes
    ...
  }
}
			@property {number} [tickInterval=1] The interval (seconds) between <code>onTick</code> callbacks. */
		defaultOptions: {
			until: null,
			since: null,
			timezone: null,
			serverSync: null,
			format: 'dHMS',
			layout: '',
			compact: false,
			padZeroes: false,
			significant: 0,
			description: '',
			expiryUrl: '',
			expiryText: '',
			alwaysExpire: false,
			onExpiry: null,
			onTick: null,
			tickInterval: 1
		},

		/** Localisations for the plugin.
			Entries are objects indexed by the language code ('' being the default US/English).
			Each object has the following attributes.
			@property {string[]} [labels=['Years','Months','Weeks','Days','Hours','Minutes','Seconds']]
						The display texts for the counter periods.
			@property {string[]} [labels1=['Year','Month','Week','Day','Hour','Minute','Second']]
						The display texts for the counter periods if they have a value of 1.
						Add other <code>labels<em>n</em></code> attributes as necessary to
						cater for other numeric idiosyncrasies of the localisation.
			@property {string[]}[compactLabels=['y','m','w','d']] The compact texts for the counter periods.
			@property {CountdownWhichLabelsCallback} [whichLabels=null] A function to determine which
						<code>labels<em>n</em></code> to use.
			@example whichLabels: function(num) {
  return (num > 1 ? 0 : 1);
}
			@property {string[]} [digits=['0','1',...,'9']] The digits to display (0-9).
			@property {string} [timeSeparator=':'] Separator for time periods in the compact layout.
			@property {boolean} [isRTL=false] <code>true</code> for right-to-left languages,
						<code>false</code> for left-to-right. */
		regionalOptions: { // Available regional settings, indexed by language/country code
			'': { // Default regional settings - English/US
				labels: ['Years', 'Months', 'Weeks', 'Days', 'Hours', 'Minutes', 'Seconds'],
				labels1: ['Year', 'Month', 'Week', 'Day', 'Hour', 'Minute', 'Second'],
				compactLabels: ['y', 'm', 'w', 'd'],
				whichLabels: null,
				digits: ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9'],
				timeSeparator: ':',
				isRTL: false
			}
		},

		/* Class name for the right-to-left marker. */
		_rtlClass: pluginName + '-rtl',
		/* Class name for the countdown section marker. */
		_sectionClass: pluginName + '-section',
		/* Class name for the period amount marker. */
		_amountClass: pluginName + '-amount',
		/* Class name for the period name marker. */
		_periodClass: pluginName + '-period',
		/* Class name for the countdown row marker. */
		_rowClass: pluginName + '-row',
		/* Class name for the holding countdown marker. */
		_holdingClass: pluginName + '-holding',
		/* Class name for the showing countdown marker. */
		_showClass: pluginName + '-show',
		/* Class name for the description marker. */
		_descrClass: pluginName + '-descr',

		/* List of currently active countdown elements. */
		_timerElems: [],

		/** Additional setup for the countdown.
			Apply default localisations.
			Create the timer.
			@private */
		_init: function() {
			var self = this;
			this._super();
			this._serverSyncs = [];
			var now = (typeof Date.now === 'function' ? Date.now : function() { return new Date().getTime(); });
			var perfAvail = (window.performance && typeof window.performance.now === 'function');
			// Shared timer for all countdowns
			function timerCallBack(timestamp) {
				var drawStart = (timestamp < 1e12 ? // New HTML5 high resolution timer
					(perfAvail ? (window.performance.now() + window.performance.timing.navigationStart) : now()) :
					// Integer milliseconds since unix epoch
					timestamp || now());
				if (drawStart - animationStartTime >= 1000) {
					self._updateElems();
					animationStartTime = drawStart;
				}
				requestAnimationFrame(timerCallBack);
			}
			var requestAnimationFrame = window.requestAnimationFrame ||
				window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame ||
				window.oRequestAnimationFrame || window.msRequestAnimationFrame || null;
				// This is when we expect a fall-back to setInterval as it's much more fluid
			var animationStartTime = 0;
			if (!requestAnimationFrame || $.noRequestAnimationFrame) {
				$.noRequestAnimationFrame = null;
				// Fall back to good old setInterval
				$.countdown._timer = setInterval(function() { self._updateElems(); }, 1000);
			}
			else {
				animationStartTime = window.animationStartTime ||
					window.webkitAnimationStartTime || window.mozAnimationStartTime ||
					window.oAnimationStartTime || window.msAnimationStartTime || now();
				requestAnimationFrame(timerCallBack);
			}
		},

		/** Convert a date/time to UTC.
			@param {number} tz The hour or minute offset from GMT, e.g. +9, -360.
			@param {Date|number} year the date/time in that timezone or the year in that timezone.
			@param {number} [month] The month (0 - 11) (omit if <code>year</code> is a <code>Date</code>).
			@param {number} [day] The day (omit if <code>year</code> is a <code>Date</code>).
			@param {number} [hours] The hour (omit if <code>year</code> is a <code>Date</code>).
			@param {number} [mins] The minute (omit if <code>year</code> is a <code>Date</code>).
			@param {number} [secs] The second (omit if <code>year</code> is a <code>Date</code>).
			@param {number} [ms] The millisecond (omit if <code>year</code> is a <code>Date</code>).
			@return {Date} The equivalent UTC date/time.
			@example $.countdown.UTCDate(+10, 2013, 12-1, 25, 12, 0)
$.countdown.UTCDate(-7, new Date(2013, 12-1, 25, 12, 0)) */
		UTCDate: function(tz, year, month, day, hours, mins, secs, ms) {
			if (typeof year === 'object' && year instanceof Date) {
				ms = year.getMilliseconds();
				secs = year.getSeconds();
				mins = year.getMinutes();
				hours = year.getHours();
				day = year.getDate();
				month = year.getMonth();
				year = year.getFullYear();
			}
			var d = new Date();
			d.setUTCFullYear(year);
			d.setUTCDate(1);
			d.setUTCMonth(month || 0);
			d.setUTCDate(day || 1);
			d.setUTCHours(hours || 0);
			d.setUTCMinutes((mins || 0) - (Math.abs(tz) < 30 ? tz * 60 : tz));
			d.setUTCSeconds(secs || 0);
			d.setUTCMilliseconds(ms || 0);
			return d;
		},

		/** Convert a set of periods into seconds.
			Averaged for months and years.
			@param {number[]} periods The periods per year/month/week/day/hour/minute/second.
			@return {number} The corresponding number of seconds.
			@example var secs = $.countdown.periodsToSeconds(periods) */
		periodsToSeconds: function(periods) {
			return periods[0] * 31557600 + periods[1] * 2629800 + periods[2] * 604800 +
				periods[3] * 86400 + periods[4] * 3600 + periods[5] * 60 + periods[6];
		},

		/** Resynchronise the countdowns with the server.
			@example $.countdown.resync() */
		resync: function() {
			var self = this;
			$('.' + this._getMarker()).each(function() { // Each countdown
				var inst = $.data(this, self.name);
				if (inst.options.serverSync) { // If synced
					var serverSync = null;
					for (var i = 0; i < self._serverSyncs.length; i++) {
						if (self._serverSyncs[i][0] === inst.options.serverSync) { // Find sync details
							serverSync = self._serverSyncs[i];
							break;
						}
					}
					if (self._eqNull(serverSync[2])) { // Recalculate if missing
						var serverResult = ($.isFunction(inst.options.serverSync) ?
							inst.options.serverSync.apply(this, []) : null);
						serverSync[2] =
							(serverResult ? new Date().getTime() - serverResult.getTime() : 0) - serverSync[1];
					}
					if (inst._since) { // Apply difference
						inst._since.setMilliseconds(inst._since.getMilliseconds() + serverSync[2]);
					}
					inst._until.setMilliseconds(inst._until.getMilliseconds() + serverSync[2]);
				}
			});
			for (var i = 0; i < self._serverSyncs.length; i++) { // Update sync details
				if (!self._eqNull(self._serverSyncs[i][2])) {
					self._serverSyncs[i][1] += self._serverSyncs[i][2];
					delete self._serverSyncs[i][2];
				}
			}
		},

		_instSettings: function(elem, options) { // jshint unused:false
			return {_periods: [0, 0, 0, 0, 0, 0, 0]};
		},

		/** Add an element to the list of active ones.
			@private
			@param {Element} elem The countdown element. */
		_addElem: function(elem) {
			if (!this._hasElem(elem)) {
				this._timerElems.push(elem);
			}
		},

		/** See if an element is in the list of active ones.
			@private
			@param {Element} elem The countdown element.
			@return {boolean} <code>true</code> if present, <code>false</code> if not. */
		_hasElem: function(elem) {
			return ($.inArray(elem, this._timerElems) > -1);
		},

		/** Remove an element from the list of active ones.
			@private
			@param {Element} elem The countdown element. */
		_removeElem: function(elem) {
			this._timerElems = $.map(this._timerElems,
				function(value) { return (value === elem ? null : value); }); // delete entry
		},

		/** Update each active timer element.
			@private */
		_updateElems: function() {
			for (var i = this._timerElems.length - 1; i >= 0; i--) {
				this._updateCountdown(this._timerElems[i]);
			}
		},

		_optionsChanged: function(elem, inst, options) {
			if (options.layout) {
				options.layout = options.layout.replace(/&lt;/g, '<').replace(/&gt;/g, '>');
			}
			this._resetExtraLabels(inst.options, options);
			var timezoneChanged = (inst.options.timezone !== options.timezone);
			$.extend(inst.options, options);
			this._adjustSettings(elem, inst,
				!this._eqNull(options.until) || !this._eqNull(options.since) || timezoneChanged);
			var now = new Date();
			if ((inst._since && inst._since < now) || (inst._until && inst._until > now)) {
				this._addElem(elem[0]);
			}
			this._updateCountdown(elem, inst);
		},

		/** Redisplay the countdown with an updated display.
			@private
			@param {Element|jQuery} elem The containing element.
			@param {object} inst The current settings for this instance. */
		_updateCountdown: function(elem, inst) {
			elem = elem.jquery ? elem : $(elem);
			inst = inst || this._getInst(elem);
			if (!inst) {
				return;
			}
			elem.html(this._generateHTML(inst)).toggleClass(this._rtlClass, inst.options.isRTL);
			if (inst._hold !== 'pause' && $.isFunction(inst.options.onTick)) {
				var periods = inst._hold !== 'lap' ? inst._periods :
					this._calculatePeriods(inst, inst._show, inst.options.significant, new Date());
				if (inst.options.tickInterval === 1 ||
						this.periodsToSeconds(periods) % inst.options.tickInterval === 0) {
					inst.options.onTick.apply(elem[0], [periods]);
				}
			}
			var expired = inst._hold !== 'pause' &&
				(inst._since ? inst._now.getTime() < inst._since.getTime() :
				inst._now.getTime() >= inst._until.getTime());
			if (expired && !inst._expiring) {
				inst._expiring = true;
				if (this._hasElem(elem[0]) || inst.options.alwaysExpire) {
					this._removeElem(elem[0]);
					if ($.isFunction(inst.options.onExpiry)) {
						inst.options.onExpiry.apply(elem[0], []);
					}
					if (inst.options.expiryText) {
						var layout = inst.options.layout;
						inst.options.layout = inst.options.expiryText;
						this._updateCountdown(elem[0], inst);
						inst.options.layout = layout;
					}
					if (inst.options.expiryUrl) {
						window.location = inst.options.expiryUrl;
					}
				}
				inst._expiring = false;
			}
			else if (inst._hold === 'pause') {
				this._removeElem(elem[0]);
			}
		},

		/** Reset any extra labelsn and compactLabelsn entries if changing labels.
			@private
			@param {object} base The options to be updated.
			@param {object} options The new option values. */
		_resetExtraLabels: function(base, options) {
			var n = null;
			for (n in options) {
				if (n.match(/[Ll]abels[02-9]|compactLabels1/)) {
					base[n] = options[n];
				}
			}
			for (n in base) { // Remove custom numbered labels
				if (n.match(/[Ll]abels[02-9]|compactLabels1/) && typeof options[n] === 'undefined') {
					base[n] = null;
				}
			}
		},
		
		/** Determine whether or not a value is equivalent to <code>null</code>.
			@private
			@param {object} value The value to test.
			@return {boolean} <code>true</code> if equivalent to <code>null</code>, <code>false</code> if not. */
		_eqNull: function(value) {
			return typeof value === 'undefined' || value === null;
		},


		/** Calculate internal settings for an instance.
			@private
			@param {jQuery} elem The containing element.
			@param {object} inst The current settings for this instance.
			@param {boolean} recalc <code>true</code> if until or since are set. */
		_adjustSettings: function(elem, inst, recalc) {
			var serverEntry = null;
			for (var i = 0; i < this._serverSyncs.length; i++) {
				if (this._serverSyncs[i][0] === inst.options.serverSync) {
					serverEntry = this._serverSyncs[i][1];
					break;
				}
			}
			var now = null;
			var serverOffset = null;
			if (!this._eqNull(serverEntry)) {
				now = new Date();
				serverOffset = (inst.options.serverSync ? serverEntry : 0);
			}
			else {
				var serverResult = ($.isFunction(inst.options.serverSync) ?
					inst.options.serverSync.apply(elem[0], []) : null);
				now = new Date();
				serverOffset = (serverResult ? now.getTime() - serverResult.getTime() : 0);
				this._serverSyncs.push([inst.options.serverSync, serverOffset]);
			}
			var timezone = inst.options.timezone;
			timezone = (this._eqNull(timezone) ? -now.getTimezoneOffset() : timezone);
			if (recalc || (!recalc && this._eqNull(inst._until) && this._eqNull(inst._since))) {
				inst._since = inst.options.since;
				if (!this._eqNull(inst._since)) {
					inst._since = this.UTCDate(timezone, this._determineTime(inst._since, null));
					if (inst._since && serverOffset) {
						inst._since.setMilliseconds(inst._since.getMilliseconds() + serverOffset);
					}
				}
				inst._until = this.UTCDate(timezone, this._determineTime(inst.options.until, now));
				if (serverOffset) {
					inst._until.setMilliseconds(inst._until.getMilliseconds() + serverOffset);
				}
			}
			inst._show = this._determineShow(inst);
		},

		/** Remove the countdown widget from an element.
			@private
			@param {jQuery} elem The containing element.
			@param {object} inst The current instance object. */
		_preDestroy: function(elem, inst) { // jshint unused:false
			this._removeElem(elem[0]);
			elem.empty();
		},

		/** Pause a countdown widget at the current time.
			Stop it running but remember and display the current time.
			@param {Element} elem The containing element.
			@example $(selector).countdown('pause') */
		pause: function(elem) {
			this._hold(elem, 'pause');
		},

		/** Pause a countdown widget at the current time.
			Stop the display but keep the countdown running.
			@param {Element} elem The containing element.
			@example $(selector).countdown('lap') */
		lap: function(elem) {
			this._hold(elem, 'lap');
		},

		/** Resume a paused countdown widget.
			@param {Element} elem The containing element.
			@example $(selector).countdown('resume') */
		resume: function(elem) {
			this._hold(elem, null);
		},

		/** Toggle a paused countdown widget.
			@param {Element} elem The containing element.
			@example $(selector).countdown('toggle') */
		toggle: function(elem) {
			var inst = $.data(elem, this.name) || {};
			this[!inst._hold ? 'pause' : 'resume'](elem);
		},

		/** Toggle a lapped countdown widget.
			@param {Element} elem The containing element.
			@example $(selector).countdown('toggleLap') */
		toggleLap: function(elem) {
			var inst = $.data(elem, this.name) || {};
			this[!inst._hold ? 'lap' : 'resume'](elem);
		},

		/** Pause or resume a countdown widget.
			@private
			@param {Element} elem The containing element.
			@param {string} hold The new hold setting. */
		_hold: function(elem, hold) {
			var inst = $.data(elem, this.name);
			if (inst) {
				if (inst._hold === 'pause' && !hold) {
					inst._periods = inst._savePeriods;
					var sign = (inst._since ? '-' : '+');
					inst[inst._since ? '_since' : '_until'] =
						this._determineTime(sign + inst._periods[0] + 'y' +
							sign + inst._periods[1] + 'o' + sign + inst._periods[2] + 'w' +
							sign + inst._periods[3] + 'd' + sign + inst._periods[4] + 'h' + 
							sign + inst._periods[5] + 'm' + sign + inst._periods[6] + 's');
					this._addElem(elem);
				}
				inst._hold = hold;
				inst._savePeriods = (hold === 'pause' ? inst._periods : null);
				$.data(elem, this.name, inst);
				this._updateCountdown(elem, inst);
			}
		},

		/** Return the current time periods, broken down by years, months, weeks, days, hours, minutes, and seconds.
			@param {Element} elem The containing element.
			@return {number[]} The current periods for the countdown.
			@example var periods = $(selector).countdown('getTimes') */
		getTimes: function(elem) {
			var inst = $.data(elem, this.name);
			return (!inst ? null : (inst._hold === 'pause' ? inst._savePeriods : (!inst._hold ? inst._periods :
				this._calculatePeriods(inst, inst._show, inst.options.significant, new Date()))));
		},

		/** A time may be specified as an exact value or a relative one.
			@private
			@param {string|number|Date} setting The date/time value as a relative or absolute value.
			@param {Date} defaultTime The date/time to use if no other is supplied.
			@return {Date} The corresponding date/time. */
		_determineTime: function(setting, defaultTime) {
			var self = this;
			var offsetNumeric = function(offset) { // e.g. +300, -2
				var time = new Date();
				time.setTime(time.getTime() + offset * 1000);
				return time;
			};
			var offsetString = function(offset) { // e.g. '+2d', '-4w', '+3h +30m'
				offset = offset.toLowerCase();
				var time = new Date();
				var year = time.getFullYear();
				var month = time.getMonth();
				var day = time.getDate();
				var hour = time.getHours();
				var minute = time.getMinutes();
				var second = time.getSeconds();
				var pattern = /([+-]?[0-9]+)\s*(s|m|h|d|w|o|y)?/g;
				var matches = pattern.exec(offset);
				while (matches) {
					switch (matches[2] || 's') {
						case 's':
							second += parseInt(matches[1], 10);
							break;
						case 'm':
							minute += parseInt(matches[1], 10);
							break;
						case 'h':
							hour += parseInt(matches[1], 10);
							break;
						case 'd':
							day += parseInt(matches[1], 10);
							break;
						case 'w':
							day += parseInt(matches[1], 10) * 7;
							break;
						case 'o':
							month += parseInt(matches[1], 10); 
							day = Math.min(day, self._getDaysInMonth(year, month));
							break;
						case 'y':
							year += parseInt(matches[1], 10);
							day = Math.min(day, self._getDaysInMonth(year, month));
							break;
					}
					matches = pattern.exec(offset);
				}
				return new Date(year, month, day, hour, minute, second, 0);
			};
			var time = (this._eqNull(setting) ? defaultTime :
				(typeof setting === 'string' ? offsetString(setting) :
				(typeof setting === 'number' ? offsetNumeric(setting) : setting)));
			if (time) {
				time.setMilliseconds(0);
			}
			return time;
		},

		/** Determine the number of days in a month.
			@private
			@param {number} year The year.
			@param {number} month The month.
			@return {number} The days in that month. */
		_getDaysInMonth: function(year, month) {
			return 32 - new Date(year, month, 32).getDate();
		},

		/** Default implementation to determine which set of labels should be used for an amount.
			Use the <code>labels</code> attribute with the same numeric suffix (if it exists).
			@private
			@param {number} num The amount to be displayed.
			@return {number} The set of labels to be used for this amount. */
		_normalLabels: function(num) {
			return num;
		},

		/** Generate the HTML to display the countdown widget.
			@private
			@param {object} inst The current settings for this instance.
			@return {string} The new HTML for the countdown display. */
		_generateHTML: function(inst) {
			var self = this;
			// Determine what to show
			inst._periods = (inst._hold ? inst._periods :
				this._calculatePeriods(inst, inst._show, inst.options.significant, new Date()));
			// Show all 'asNeeded' after first non-zero value
			var shownNonZero = false;
			var showCount = 0;
			var sigCount = inst.options.significant;
			var show = $.extend({}, inst._show);
			var period = null;
			for (period = Y; period <= S; period++) {
				shownNonZero = shownNonZero || (inst._show[period] === '?' && inst._periods[period] > 0);
				show[period] = (inst._show[period] === '?' && !shownNonZero ? null : inst._show[period]);
				showCount += (show[period] ? 1 : 0);
				sigCount -= (inst._periods[period] > 0 ? 1 : 0);
			}
			var showSignificant = [false, false, false, false, false, false, false];
			for (period = S; period >= Y; period--) { // Determine significant periods
				if (inst._show[period]) {
					if (inst._periods[period]) {
						showSignificant[period] = true;
					}
					else {
						showSignificant[period] = sigCount > 0;
						sigCount--;
					}
				}
			}
			var labels = (inst.options.compact ? inst.options.compactLabels : inst.options.labels);
			var whichLabels = inst.options.whichLabels || this._normalLabels;
			var showCompact = function(period) {
				var labelsNum = inst.options['compactLabels' + whichLabels(inst._periods[period])];
				return (show[period] ? self._translateDigits(inst, inst._periods[period]) +
					(labelsNum ? labelsNum[period] : labels[period]) + ' ' : '');
			};
			var minDigits = (inst.options.padZeroes ? 2 : 1);
			var showFull = function(period) {
				var labelsNum = inst.options['labels' + whichLabels(inst._periods[period])];
				return ((!inst.options.significant && show[period]) ||
					(inst.options.significant && showSignificant[period]) ?
						'<span class="' + self._sectionClass + '">' +
						'<span class="' + self._amountClass + '">' +
					self._minDigits(inst, inst._periods[period], minDigits) + '</span>' +
					'<span class="' + self._periodClass + '">' +
					(labelsNum ? labelsNum[period] : labels[period]) + '</span></span>' : '');
			};
			return (inst.options.layout ? this._buildLayout(inst, show, inst.options.layout,
				inst.options.compact, inst.options.significant, showSignificant) :
				((inst.options.compact ? // Compact version
				'<span class="' + this._rowClass + ' ' + this._amountClass +
				(inst._hold ? ' ' + this._holdingClass : '') + '">' + 
				showCompact(Y) + showCompact(O) + showCompact(W) + showCompact(D) + 
				(show[H] ? this._minDigits(inst, inst._periods[H], 2) : '') +
				(show[M] ? (show[H] ? inst.options.timeSeparator : '') +
				this._minDigits(inst, inst._periods[M], 2) : '') +
				(show[S] ? (show[H] || show[M] ? inst.options.timeSeparator : '') +
				this._minDigits(inst, inst._periods[S], 2) : '') :
				// Full version
				'<span class="' + this._rowClass + ' ' + this._showClass + (inst.options.significant || showCount) +
				(inst._hold ? ' ' + this._holdingClass : '') + '">' +
				showFull(Y) + showFull(O) + showFull(W) + showFull(D) +
				showFull(H) + showFull(M) + showFull(S)) + '</span>' +
				(inst.options.description ? '<span class="' + this._rowClass + ' ' + this._descrClass + '">' +
				inst.options.description + '</span>' : '')));
		},

		/** Construct a custom layout.
			@private
			@param {object} inst The current settings for this instance.
			@param {boolean[]} show Flags indicating which periods are requested.
			@param {string} layout The customised layout.
			@param {boolean} compact <code>true</code> if using compact labels.
			@param {number} significant The number of periods with values to show, zero for all.
			@param {boolean[]} showSignificant Other periods to show for significance.
			@return {string} The custom HTML. */
		_buildLayout: function(inst, show, layout, compact, significant, showSignificant) {
			var labels = inst.options[compact ? 'compactLabels' : 'labels'];
			var whichLabels = inst.options.whichLabels || this._normalLabels;
			var labelFor = function(index) {
				return (inst.options[(compact ? 'compactLabels' : 'labels') +
					whichLabels(inst._periods[index])] || labels)[index];
			};
			var digit = function(value, position) {
				return inst.options.digits[Math.floor(value / position) % 10];
			};
			var subs = {desc: inst.options.description, sep: inst.options.timeSeparator,
				yl: labelFor(Y), yn: this._minDigits(inst, inst._periods[Y], 1),
				ynn: this._minDigits(inst, inst._periods[Y], 2),
				ynnn: this._minDigits(inst, inst._periods[Y], 3), y1: digit(inst._periods[Y], 1),
				y10: digit(inst._periods[Y], 10), y100: digit(inst._periods[Y], 100),
				y1000: digit(inst._periods[Y], 1000),
				ol: labelFor(O), on: this._minDigits(inst, inst._periods[O], 1),
				onn: this._minDigits(inst, inst._periods[O], 2),
				onnn: this._minDigits(inst, inst._periods[O], 3), o1: digit(inst._periods[O], 1),
				o10: digit(inst._periods[O], 10), o100: digit(inst._periods[O], 100),
				o1000: digit(inst._periods[O], 1000),
				wl: labelFor(W), wn: this._minDigits(inst, inst._periods[W], 1),
				wnn: this._minDigits(inst, inst._periods[W], 2),
				wnnn: this._minDigits(inst, inst._periods[W], 3), w1: digit(inst._periods[W], 1),
				w10: digit(inst._periods[W], 10), w100: digit(inst._periods[W], 100),
				w1000: digit(inst._periods[W], 1000),
				dl: labelFor(D), dn: this._minDigits(inst, inst._periods[D], 1),
				dnn: this._minDigits(inst, inst._periods[D], 2),
				dnnn: this._minDigits(inst, inst._periods[D], 3), d1: digit(inst._periods[D], 1),
				d10: digit(inst._periods[D], 10), d100: digit(inst._periods[D], 100),
				d1000: digit(inst._periods[D], 1000),
				hl: labelFor(H), hn: this._minDigits(inst, inst._periods[H], 1),
				hnn: this._minDigits(inst, inst._periods[H], 2),
				hnnn: this._minDigits(inst, inst._periods[H], 3), h1: digit(inst._periods[H], 1),
				h10: digit(inst._periods[H], 10), h100: digit(inst._periods[H], 100),
				h1000: digit(inst._periods[H], 1000),
				ml: labelFor(M), mn: this._minDigits(inst, inst._periods[M], 1),
				mnn: this._minDigits(inst, inst._periods[M], 2),
				mnnn: this._minDigits(inst, inst._periods[M], 3), m1: digit(inst._periods[M], 1),
				m10: digit(inst._periods[M], 10), m100: digit(inst._periods[M], 100),
				m1000: digit(inst._periods[M], 1000),
				sl: labelFor(S), sn: this._minDigits(inst, inst._periods[S], 1),
				snn: this._minDigits(inst, inst._periods[S], 2),
				snnn: this._minDigits(inst, inst._periods[S], 3), s1: digit(inst._periods[S], 1),
				s10: digit(inst._periods[S], 10), s100: digit(inst._periods[S], 100),
				s1000: digit(inst._periods[S], 1000)};
			var html = layout;
			// Replace period containers: {p<}...{p>}
			for (var i = Y; i <= S; i++) {
				var period = 'yowdhms'.charAt(i);
				var re = new RegExp('\\{' + period + '<\\}([\\s\\S]*)\\{' + period + '>\\}', 'g');
				html = html.replace(re, ((!significant && show[i]) ||
					(significant && showSignificant[i]) ? '$1' : ''));
			}
			// Replace period values: {pn}
			$.each(subs, function(n, v) {
				var re = new RegExp('\\{' + n + '\\}', 'g');
				html = html.replace(re, v);
			});
			return html;
		},

		/** Ensure a numeric value has at least n digits for display.
			@private
			@param {object} inst The current settings for this instance.
			@param {number} value The value to display.
			@param {number} len The minimum length.
			@return {string} The display text. */
		_minDigits: function(inst, value, len) {
			value = '' + value;
			if (value.length >= len) {
				return this._translateDigits(inst, value);
			}
			value = '0000000000' + value;
			return this._translateDigits(inst, value.substr(value.length - len));
		},

		/** Translate digits into other representations.
			@private
			@param {object} inst The current settings for this instance.
			@param {string} value The text to translate.
			@return {string} The translated text. */
		_translateDigits: function(inst, value) {
			return ('' + value).replace(/[0-9]/g, function(digit) {
					return inst.options.digits[digit];
				});
		},

		/** Translate the format into flags for each period.
			@private
			@param {object} inst The current settings for this instance.
			@return {string[]} Flags indicating which periods are requested (?) or
					required (!) by year, month, week, day, hour, minute, second. */
		_determineShow: function(inst) {
			var format = inst.options.format;
			var show = [];
			show[Y] = (format.match('y') ? '?' : (format.match('Y') ? '!' : null));
			show[O] = (format.match('o') ? '?' : (format.match('O') ? '!' : null));
			show[W] = (format.match('w') ? '?' : (format.match('W') ? '!' : null));
			show[D] = (format.match('d') ? '?' : (format.match('D') ? '!' : null));
			show[H] = (format.match('h') ? '?' : (format.match('H') ? '!' : null));
			show[M] = (format.match('m') ? '?' : (format.match('M') ? '!' : null));
			show[S] = (format.match('s') ? '?' : (format.match('S') ? '!' : null));
			return show;
		},

		/** Calculate the requested periods between now and the target time.
			@private
			@param {object} inst The current settings for this instance.
			@param {string[]} show Flags indicating which periods are requested/required.
			@param {number} significant The number of periods with values to show, zero for all.
			@param {Date} now The current date and time.
			@return {number[]} The current time periods (always positive)
					by year, month, week, day, hour, minute, second. */
		_calculatePeriods: function(inst, show, significant, now) {
			// Find endpoints
			inst._now = now;
			inst._now.setMilliseconds(0);
			var until = new Date(inst._now.getTime());
			if (inst._since) {
				if (now.getTime() < inst._since.getTime()) {
					inst._now = now = until;
				}
				else {
					now = inst._since;
				}
			}
			else {
				until.setTime(inst._until.getTime());
				if (now.getTime() > inst._until.getTime()) {
					inst._now = now = until;
				}
			}
			// Calculate differences by period
			var periods = [0, 0, 0, 0, 0, 0, 0];
			if (show[Y] || show[O]) {
				// Treat end of months as the same
				var lastNow = this._getDaysInMonth(now.getFullYear(), now.getMonth());
				var lastUntil = this._getDaysInMonth(until.getFullYear(), until.getMonth());
				var sameDay = (until.getDate() === now.getDate() ||
					(until.getDate() >= Math.min(lastNow, lastUntil) &&
					now.getDate() >= Math.min(lastNow, lastUntil)));
				var getSecs = function(date) {
					return (date.getHours() * 60 + date.getMinutes()) * 60 + date.getSeconds();
				};
				var months = Math.max(0,
					(until.getFullYear() - now.getFullYear()) * 12 + until.getMonth() - now.getMonth() +
					((until.getDate() < now.getDate() && !sameDay) ||
					(sameDay && getSecs(until) < getSecs(now)) ? -1 : 0));
				periods[Y] = (show[Y] ? Math.floor(months / 12) : 0);
				periods[O] = (show[O] ? months - periods[Y] * 12 : 0);
				// Adjust for months difference and end of month if necessary
				now = new Date(now.getTime());
				var wasLastDay = (now.getDate() === lastNow);
				var lastDay = this._getDaysInMonth(now.getFullYear() + periods[Y],
					now.getMonth() + periods[O]);
				if (now.getDate() > lastDay) {
					now.setDate(lastDay);
				}
				now.setFullYear(now.getFullYear() + periods[Y]);
				now.setMonth(now.getMonth() + periods[O]);
				if (wasLastDay) {
					now.setDate(lastDay);
				}
			}
			var diff = Math.floor((until.getTime() - now.getTime()) / 1000);
			var period = null;
			var extractPeriod = function(period, numSecs) {
				periods[period] = (show[period] ? Math.floor(diff / numSecs) : 0);
				diff -= periods[period] * numSecs;
			};
			extractPeriod(W, 604800);
			extractPeriod(D, 86400);
			extractPeriod(H, 3600);
			extractPeriod(M, 60);
			extractPeriod(S, 1);
			if (diff > 0 && !inst._since) { // Round up if left overs
				var multiplier = [1, 12, 4.3482, 7, 24, 60, 60];
				var lastShown = S;
				var max = 1;
				for (period = S; period >= Y; period--) {
					if (show[period]) {
						if (periods[lastShown] >= max) {
							periods[lastShown] = 0;
							diff = 1;
						}
						if (diff > 0) {
							periods[period]++;
							diff = 0;
							lastShown = period;
							max = 1;
						}
					}
					max *= multiplier[period];
				}
			}
			if (significant) { // Zero out insignificant periods
				for (period = Y; period <= S; period++) {
					if (significant && periods[period]) {
						significant--;
					}
					else if (!significant) {
						periods[period] = 0;
					}
				}
			}
			return periods;
		}
	});

})(jQuery);

?>