# Source: jquery.countdown.js

    /*! 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);