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/********************************************************************
 *	Kalendae, a framework agnostic javascript date picker           *
 *	Copyright(c) 2013-2016 Jarvis Badgley (chipersoft@gmail.com)    *
 *	http://github.com/ChiperSoft/Kalendae                           *
 *	Version 0.6.1                                                   *
 ********************************************************************/

(function (factory) {
   if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        define(['moment'], factory);
    } else if ( typeof exports === 'object' ) {
        // Node/CommonJS
        module.exports = factory(require('moment'));
    } else {
        // Browser globals
        window.Kalendae = factory();
    }
} (function (moment) {
var getTodayYearDate = function() {
	return Kalendae.moment().startOf('day').yearDay();
};

var Kalendae = function (targetElement, options) {
	if (typeof document.addEventListener !== 'function' && !util.isIE8()) return;

	//if the first argument isn't an element and isn't a string, assume that it is the options object
	var is_element = false;
	try {
		is_element = targetElement instanceof Element;
	}
	catch (err) {
		is_element = !!targetElement && is_element.nodeType === 1;
	}
	if (!(is_element || typeof(targetElement) === 'string')) options = targetElement;

	var self = this,
		classes = self.classes,
		opts = self.settings = util.merge(self.defaults, {attachTo:targetElement}, options || {}),
		$container = self.container = util.make('div', {'class':classes.container}),
		calendars = self.calendars = [],
		startDay = moment().day(opts.weekStart),
		vsd,
		columnHeaders = [],
		$cal,
		$title,
		$caption,
		$header,
		$days, $week, dayNodes = [],
		$span,
		i = 0,
		j = opts.months;

	if (util.isIE8()) util.addClassName($container, 'ie8');

	//generate the column headers (Su, Mo, Tu, etc)
	i = 7;
	while (i--) {
		columnHeaders.push( startDay.format(opts.columnHeaderFormat) );
		startDay.add(1, 'days');
	}

	//setup publish/subscribe and apply any subscriptions passed in settings
	MinPubSub(self);
	if (typeof opts.subscribe === 'object') {
		for (i in opts.subscribe) if (opts.subscribe.hasOwnProperty(i)) {
			self.subscribe(i, opts.subscribe[i]);
		}
	}

    //set the view month
    if (!!opts.viewStartDate) {
        vsd = moment(opts.viewStartDate, opts.format);
    } else {
        vsd = moment();
    }
    self.viewStartDate = vsd.date(1);

    //process default selected dates
    self._sel = [];
    if (!!opts.selected) {
        self.setSelected(opts.selected, false);
        self.viewStartDate = moment(self._sel[0]);
    }

	var viewDelta = ({
		'past'          : opts.months-1,
		'today-past'    : opts.months-1,
		'any'           : opts.months>2?Math.floor(opts.months/2):0,
		'today-future'  : 0,
		'future'        : 0
	})[this.settings.direction];


	if (viewDelta && moment().month()==moment(self.viewStartDate).month()){
		self.viewStartDate = moment(self.viewStartDate).subtract({M:viewDelta}).date(1);
	}

	// store the view that the calendar initialized with in-case we want to reset.
	self.defaultView = moment(self.viewStartDate);

	if (typeof opts.blackout === 'function') {
		self.blackout = opts.blackout;
	} else if (!!opts.blackout) {
		var bdates = parseDates(opts.blackout, opts.parseSplitDelimiter, opts.format);
		self.blackout = function (input) {
			input = moment(input).startOf('day').yearDay();
			if (input < 1 || !self._sel) return false;
			var i = bdates.length;
			while (i--) if (bdates[i].startOf('day').yearDay() === input) return true;
			return false;
		};
	} else {
		self.blackout = function () {return false;};
	}


	self.direction = self.directions[opts.direction] ? self.directions[opts.direction] : self.directions['any'];


	//for the total months setting, generate N calendar views and add them to the container
	j = Math.max(opts.months,1);
	while (j--) {
		$cal = util.make('div', {'class':classes.calendar}, $container);

		$cal.setAttribute('data-cal-index', j);
		if (opts.months > 1) {
			if (j == Math.max(opts.months-1,1)) util.addClassName($cal, classes.monthFirst);
			else if (j === 0) util.addClassName($cal, classes.monthLast);
			else util.addClassName($cal, classes.monthMiddle);
		}

		//title bar
		$title = util.make('div', {'class':classes.title}, $cal);
		if(!opts.useYearNav){
			util.addClassName($title, classes.disableYearNav);
		}
		util.make('a', {'class':classes.previousYear}, $title);           //previous button
		util.make('a', {'class':classes.previousMonth}, $title);          //previous button
		util.make('a', {'class':classes.nextYear}, $title);               //next button
		util.make('a', {'class':classes.nextMonth}, $title);              //next button
		$caption = util.make('span', {'class':classes.caption}, $title);  //title caption

		//column headers
		$header = util.make('div', {'class':classes.header + ' ' + (opts.dayHeaderClickable == true ? classes.dayActive : '')}, $cal);
		i = 0;
		do {
			$span = util.make('span', {'data-day':i}, $header);

			if (opts.dayHeaderClickable == true && opts.mode == 'multiple') {
				$span.addEventListener("mouseover", function(e){
					var daysContainer = e.target.parentNode.nextSibling;
						daysToHover = daysContainer.getElementsByClassName('k-day-week-' + e.target.getAttribute('data-day'));
					if (daysToHover.length > 0) {
						for (var i = 0; i < daysToHover.length; i++) {
							if (util.hasClassName(daysToHover[i], classes.dayActive)) util.addClassName(daysToHover[i], 'k-day-hover-active');
						}
					}
				});
				$span.addEventListener("mouseleave", function(e){
					var daysContainer = e.target.parentNode.nextSibling;
						daysToHover = daysContainer.getElementsByClassName('k-day-week-' + e.target.getAttribute('data-day'));
					if (daysToHover.length > 0) {
						for (var i = 0; i < daysToHover.length; i++) {
							if (util.hasClassName(daysToHover[i], classes.dayActive)) util.removeClassName(daysToHover[i], 'k-day-hover-active');
						}
					}
				});
			}
			$span.innerHTML = columnHeaders[i];
		} while (++i < 7);

		//individual day cells
		$days = util.make('div', {'class':classes.days}, $cal);
		i = 0;
		dayNodes = [];
		do {
			if (opts.mode == 'week') {
				if ((i % 7) === 0) {
					$week = util.make('div', {'class': classes.week + ' clearfix'}, $days);
					dayNodes.push($week);
				}
				util.make('span', {}, $week);
			} else {
				dayNodes.push(util.make('span', {}, $days));
			}
		} while (++i < 42);

		//store each calendar view for easy redrawing
		calendars.push({
			header:$header,
			caption:$caption,
			days:dayNodes
		});

		if (j) util.make('div', {'class':classes.monthSeparator}, $container);
	}

	self.draw();

	util.addEvent($container, 'mousedown', function (event, target) {
		var clickedDate;
		if (util.hasClassName(target, classes.nextMonth)) {
		//NEXT MONTH BUTTON
			if (!self.disableNext && self.publish('view-changed', self, ['next-month']) !== false) {
				self.viewStartDate.add(1, 'months');
				self.draw();
			}
			return false;

		} else if (util.hasClassName(target, classes.previousMonth)) {
		//PREVIOUS MONTH BUTTON
			if (!self.disablePreviousMonth && self.publish('view-changed', self, ['previous-month']) !== false) {
				self.viewStartDate.subtract(1,'months');
				self.draw();
			}
			return false;

		} else if (util.hasClassName(target, classes.nextYear)) {
		//NEXT MONTH BUTTON
			if (!self.disableNext && self.publish('view-changed', self, ['next-year']) !== false) {
				self.viewStartDate.add(1, 'years');
				self.draw();
			}
			return false;

		} else if (util.hasClassName(target, classes.previousYear)) {
		//PREVIOUS MONTH BUTTON
			if (!self.disablePreviousMonth && self.publish('view-changed', self, ['previous-year']) !== false) {
				self.viewStartDate.subtract(1,'years');
				self.draw();
			}
			return false;

		} else if ( (util.hasClassName(target.parentNode, classes.days) || util.hasClassName(target.parentNode, classes.week)) && util.hasClassName(target, classes.dayActive) && (clickedDate = target.getAttribute('data-date'))) {
		//DAY CLICK
			clickedDate = moment(clickedDate, opts.dayAttributeFormat).hours(12);
			if (self.publish('date-clicked', self, [clickedDate]) !== false) {

				switch (opts.mode) {
					case 'multiple':
						if (!self.addSelected(clickedDate)) self.removeSelected(clickedDate);
						break;
					case 'range':
						self.addSelected(clickedDate);
						break;
					case 'week':
						self.weekSelected(clickedDate);
						break;
					case 'single':
						/* falls through */
					default:
						self.addSelected(clickedDate);
						break;
				}

			}
			return false;

		} else if ( util.hasClassName(target.parentNode, classes.week) && (clickedDate = target.getAttribute('data-date') ) ) {
		//INACTIVE WEEK CLICK
			clickedDate = moment(clickedDate, opts.dayAttributeFormat).hours(12);
			if (self.publish('date-clicked', self, [clickedDate]) !== false) {
				if (opts.mode == 'week') {
					self.weekSelected(clickedDate);
				}
			}
			return false;

		} else if (util.hasClassName(target.parentNode, classes.header)) {
			if (opts.mode == 'multiple' && opts.dayHeaderClickable == true) {
				var parentSelected = util.hasClassName(target, classes.daySelected),
					month =  target.parentNode.parentNode.getAttribute('data-datestart'),
					dayToSelect = target.getAttribute('data-day');

				if (parentSelected == true) {
					self.monthDaySelected(month, dayToSelect, true);
				} else {
					self.monthDaySelected(month, dayToSelect, false);
				}
			}
			return false;
		}

		return false;
	});


	if (!!(opts.attachTo = util.$(opts.attachTo))) {
		opts.attachTo.appendChild($container);
	}

};

Kalendae.prototype = {
	defaults : {
		attachTo              :null,            /* the element to attach the root container to. can be string or DOMElement */
		months                :1,               /* total number of months to display side by side */
		weekStart             :0,               /* day to use for the start of the week. 0 is Sunday */
		direction             :'any',           /* past, today-past, any, today-future, future */
		directionScrolling    :true,            /* if a direction other than any is defined, prevent scrolling out of range */
		viewStartDate         :null,            /* date in the month to display.  When multiple months, this is the left most */
		blackout              :null,            /* array of dates, or function to be passed a date */
		selected              :null,            /* dates already selected.  can be string, date, or array of strings or dates. */
		mode                  :'single',        /* single, multiple, range */
		dayOutOfMonthClickable:false,
		dayHeaderClickable    :false,
		format                :null,            /* string used for parsing dates. */
		subscribe             :null,            /* object containing events to subscribe to */

		columnHeaderFormat    :'dd',            /* number of characters to show in the column headers */
		titleFormat           :'MMMM, YYYY',    /* format mask for month titles. See momentjs.com for rules */
		dayNumberFormat       :'D',             /* format mask for individual days */
		dayAttributeFormat    :'YYYY-MM-DD',    /* format mask for the data-date attribute set on every span */
		parseSplitDelimiter   : /,\s*|\s+-\s+/, /* regex to use for splitting multiple dates from a passed string */
		rangeDelimiter        :' - ',           /* string to use between dates when outputting in range mode */
		multipleDelimiter     :', ',            /* string to use between dates when outputting in multiple mode */
		useYearNav            :true,

		dateClassMap          :{}
	},
	classes : {
		container       :'kalendae',
		calendar        :'k-calendar',
		monthFirst      :'k-first-month',
		monthMiddle     :'k-middle-month',
		monthLast       :'k-last-month',
		title           :'k-title',
		previousMonth   :'k-btn-previous-month',
		nextMonth       :'k-btn-next-month',
		previousYear    :'k-btn-previous-year',
		nextYear        :'k-btn-next-year',
		caption         :'k-caption',
		header          :'k-header',
		days            :'k-days',
		week            :'k-week',
		dayOutOfMonth   :'k-out-of-month',
		dayInMonth      :'k-in-month',
		dayActive       :'k-active',
		daySelected     :'k-selected',
		dayInRange      :'k-range',
		dayInRangeStart :'k-range-start',
		dayInRangeEnd   :'k-range-end',
		dayToday        :'k-today',
		monthSeparator  :'k-separator',
		disablePreviousMonth    :'k-disable-previous-month-btn',
		disableNextMonth        :'k-disable-next-month-btn',
		disablePreviousYear     :'k-disable-previous-year-btn',
		disableNextYear         :'k-disable-next-year-btn',
		disableYearNav          :'k-disable-year-nav'
	},

	disablePreviousMonth: false,
	disableNextMonth: false,
	disablePreviousYear: false,
	disableNextYear: false,

	directions: {
		'past'          :function (date) {return moment(date).startOf('day').yearDay() >= getTodayYearDate();},
		'today-past'    :function (date) {return moment(date).startOf('day').yearDay() > getTodayYearDate();},
		'any'           :function (date) {return false;},
		'today-future'  :function (date) {return moment(date).startOf('day').yearDay() < getTodayYearDate();},
		'future'        :function (date) {return moment(date).startOf('day').yearDay() <= getTodayYearDate();}
	},

	getSelectedAsDates : function () {
		var out = [];
		var i=0, c = this._sel.length;
		for (;i<c;i++) {
			out.push(this._sel[i].toDate());
		}
		return out;
	},

	getSelectedAsText : function (format) {
		var out = [];
		var i=0, c = this._sel.length;
		for (;i<c;i++) {
			out.push(this._sel[i].format(format || this.settings.format || 'YYYY-MM-DD'));
		}
		return out;
	},

	getSelectedRaw : function () {
		var out = [];
		var i=0, c = this._sel.length;
		for (;i<c;i++) {
			out.push(moment(this._sel[i]));
		}
		return out;
	},

	getSelected : function (format) {
		var sel = this.getSelectedAsText(format);
		switch (this.settings.mode) {
			case 'week':
				/* falls through range */

			case 'range':
				sel.splice(2); //shouldn't be more than two, but lets just make sure.
				return sel.join(this.settings.rangeDelimiter);

			case 'multiple':
				return sel.join(this.settings.multipleDelimiter);

			case 'single':
				/* falls through */
			default:
				return (sel[0] || null);
		}
	},

	isSelected : function (input) {
		input = moment(input).startOf('day').yearDay();
		if (input < 1 || !this._sel || this._sel.length < 1) return false;

		switch (this.settings.mode) {
			case 'week':
				/* falls through range */
			case 'range':
				var a = this._sel[0] ? this._sel[0].startOf('day').yearDay() : 0,
					b = this._sel[1] ? this._sel[1].startOf('day').yearDay() : 0;

				if (a === input || b === input) return 1;
				if (!a || !b) return 0;

				if ((input > a && input < b) || (a<b && input < a && input > b))  return -1;
				return false;

			case 'multiple':
				var i = this._sel.length;
				while (i--) {
					if (this._sel[i].startOf('day').yearDay() === input) {
						return true;
					}
				}
				return false;


			case 'single':
				/* falls through */
			default:
				return (this._sel[0] && (this._sel[0].startOf('day').yearDay() === input));
		}

		return false;
	},

	setSelected : function (input, draw) {
		var i,
			new_dates = parseDates(input, this.settings.parseSplitDelimiter, this.settings.format),
			old_dates = parseDates(this.getSelected(), this.settings.parseSplitDelimiter, this.settings.format);

		i = old_dates.length;
		while(i--) { this.removeSelected(old_dates[i], false); }

		i = new_dates.length;
		while(i--) { this.addSelected(new_dates[i], false); }

		if (draw !== false) {
			if (new_dates[0]) {
				this.viewStartDate = moment(new_dates[0], this.settings.format);
			}
			this.draw();
		}
	},

	addSelected : function (date, draw) {
		date = moment(date, this.settings.format).hours(12);

		if(this.settings.dayOutOfMonthClickable && this.settings.mode !== 'range'){ this.makeSelectedDateVisible(date); }

		switch (this.settings.mode) {
			case 'multiple':
				if (!this.isSelected(date)) this._sel.push(date);
				else return false;
				break;
			case 'range':

				if (this._sel.length !== 1) this._sel = [date];
				else {
					if (date.startOf('day').yearDay() > this._sel[0].startOf('day').yearDay()) this._sel[1] = date;
					else this._sel = [date, this._sel[0]];
				}
				break;
			case 'single':
				/* falls through */
			default:
				this._sel = [date];
				break;
		}
		this._sel.sort(function (a,b) {return a.startOf('day').yearDay() - b.startOf('day').yearDay();});
		this.publish('change', this, [date]);
		if (draw !== false) this.draw();
		return true;
	},

	weekSelected: function (mom) {
		var x = mom.toDate();
		var start = moment(x).startOf('week');
		var end = moment(x).endOf('week').subtract(1,'day');
		this._sel = [start, end];
		this.publish('change', this, [mom.day()]);
		this.draw();
	},

	monthDaySelected: function(month, daynumber, unselected) {
		var days = moment(month).startOf('month').weekday(daynumber),
			endMonth = moment(month).endOf('month');
			selected = [];

		while(days <= endMonth) {
			if (days >= moment(month).startOf('month') && !this.direction(days)) {
				if (unselected) {
					this.removeSelected(moment(days).hours(12));
				} else {
					this.addSelected(moment(days).hours(12));
				}
			}
			days.add(7, 'd');
		}
	},

	makeSelectedDateVisible: function (date) {
		outOfViewMonth = moment(date).date('1').diff(this.viewStartDate,'months');

		if(outOfViewMonth < 0){
			this.viewStartDate.subtract(1,'months');
		}
		else if(outOfViewMonth > 0 && outOfViewMonth >= this.settings.months){
			this.viewStartDate.add(1, 'months');
		}
	},

	removeSelected : function (date, draw) {
		date = moment(date, this.settings.format).hours(12);
		var i = this._sel.length;
		while (i--) {
			if (this._sel[i].startOf('day').yearDay() === date.startOf('day').yearDay()) {
				this._sel.splice(i,1);
				this.publish('change', this, [date]);
				if (draw !== false) this.draw();
				return true;
			}
		}
		return false;
	},

	draw : function draw() {
		// return;
		var month = moment(this.viewStartDate).startOf('month').add(12, 'hours'), //force middle of the day to avoid any weird date shifts
			day,
			classes = this.classes,
			cal,
			$span,
			klass,
			i=0, c,
			j=0, k,
			t=0, z,
			w,
			s,
			headers,
			dateString,
			opts = this.settings,
			diff;

		c = this.calendars.length;

		do {
			day = moment(month).date(1);
			day.day( day.day() < this.settings.weekStart ? this.settings.weekStart-7 : this.settings.weekStart);
			//if the first day of the month is less than our week start, back up a week

			cal = this.calendars[i];

			cal.header.parentNode.setAttribute('data-datestart', month.format(this.settings.dayAttributeFormat));

			cal.caption.innerHTML = month.format(this.settings.titleFormat);
			j = 0;
			w = 0;
			t = 0;
			headers = [];
			for (var z = 0; z < 7; z++) {
				util.removeClassName(cal.header.children[z], classes.daySelected);
				headers[z] = 0;
			}

			do {
				if (opts.mode == 'week') {
					if (((j % 7) === 0) && (j !== 0)) {
						w++;
					}
					$span = cal.days[w].childNodes[j%7];
				} else {
					$span = cal.days[j];
				}

				klass = [];

				s = this.isSelected(day);

				if (s) klass.push(({'-1':classes.dayInRange,'1':classes.daySelected, 'true':classes.daySelected})[s]);

				if (opts.mode === 'range') {
					if (this._sel[0] && this._sel[0].startOf('day').yearDay() === day.clone().startOf('day').yearDay()) {
						klass.push(classes.dayInRangeStart);
					}
					if (this._sel[1] && this._sel[1].startOf('day').yearDay() === day.clone().startOf('day').yearDay()) {
						klass.push(classes.dayInRangeEnd);
					}
				}

				if (opts.dayHeaderClickable && opts.mode === 'multiple') {
					klass.push('k-day-week-' + day.weekday());
					if ((s == true || s == 1) && !this.direction(day) && month.format('M') == day.format('M')) {
						headers[day.weekday()] = headers[day.weekday()] + 1;
					}
				}

				if (day.month() != month.month()) klass.push(classes.dayOutOfMonth);
				else klass.push(classes.dayInMonth);

				if (!(this.blackout(day) || this.direction(day) || (day.month() != month.month() && opts.dayOutOfMonthClickable === false)) || s>0) klass.push(classes.dayActive);

				if (day.clone().startOf('day').yearDay() === getTodayYearDate()) klass.push(classes.dayToday);

				dateString = day.format(this.settings.dayAttributeFormat);
				if (opts.dateClassMap[dateString]) klass.push(opts.dateClassMap[dateString]);

				$span.innerHTML = day.format(opts.dayNumberFormat);
				$span.className = klass.join(' ');
				$span.setAttribute('data-date', dateString);


				day.add(1, 'days');
			} while (++j < 42);
			z = 0;
			if (headers.length > 0) {
				do {
					if (headers[z] > 0) {
						var firstDay = Kalendae.moment(month).startOf('month').weekday(z),
							startMonth = Kalendae.moment(month).startOf('month');
							endMonth = Kalendae.moment(month).endOf('month');
						t = 0;
						do {
							if (firstDay >= startMonth && !this.direction(firstDay)) t++;
							firstDay.add(7, 'd');
						} while(firstDay <= endMonth)

						if (t == headers[z]) util.addClassName(cal.header.children[z], classes.daySelected);
						else util.removeClassName(cal.header.children[z], classes.daySelected);
					}
				} while(++z < headers.length)
			}

			month.add(1, 'months');
		} while (++i < c);

		if (opts.directionScrolling) {
			var diffComparison = moment().startOf('day').hours(12);
			diff = month.diff(diffComparison, 'months', true);

			if (opts.direction === 'today-past' || opts.direction === 'past') {
				if (diff <= 0) {
					this.disableNextMonth = false;
					util.removeClassName(this.container, classes.disableNextMonth);
				} else {
					this.disableNextMonth = true;
					util.addClassName(this.container, classes.disableNextMonth);
				}
			} else if (opts.direction === 'today-future' || opts.direction === 'future') {
				if (diff > opts.months) {
					this.disablePreviousMonth = false;
					util.removeClassName(this.container, classes.disablePreviousMonth);
				} else {
					this.disablePreviousMonth = true;
					util.addClassName(this.container, classes.disablePreviousMonth);
				}
			}

			if (opts.direction === 'today-past' || opts.direction === 'past') {
				if (diff <= -11) {
					this.disableNextYear = false;
					util.removeClassName(this.container, classes.disableNextYear);
				} else {
					this.disableNextYear = true;
					util.addClassName(this.container, classes.disableNextYear);
				}
			} else if (opts.direction==='today-future' || opts.direction==='future') {
				if (diff > (11 + opts.months)) {
					this.disablePreviousYear = false;
					util.removeClassName(this.container, classes.disablePreviousYear);
				} else {
					this.disablePreviousYear = true;
					util.addClassName(this.container, classes.disablePreviousYear);
				}
			}
		}
	}
};

var parseDates = function (input, delimiter, format) {
	var output = [];

	if (typeof input === 'string') {
		input = input.split(delimiter);
	} else if (!util.isArray(input)) {
		input = [input];
	}

	var c = input.length,
		i = 0,
		m;

	do {
		if (input[i]) {
			m = moment(input[i], format).hours(12);
			if (m.isValid()) output.push(m);
		}
	} while (++i < c);

	return output;
};



window.Kalendae = Kalendae;

var util = Kalendae.util = {

	isIE8: function() {
		return !!( (/msie 8./i).test(navigator.appVersion) && !(/opera/i).test(navigator.userAgent) && window.ActiveXObject && XDomainRequest && !window.msPerformance );
	},

// ELEMENT FUNCTIONS

	$: function (elem) {
		return (typeof elem == 'string') ? document.getElementById(elem) : elem;
	},

	$$: function (selector) {
		return document.querySelectorAll(selector);
	},

	make: function (tagName, attributes, attach) {
		var k, e = document.createElement(tagName);
		if (!!attributes) for (k in attributes) if (attributes.hasOwnProperty(k)) e.setAttribute(k, attributes[k]);
		if (!!attach) attach.appendChild(e);
		return e;
	},

	// Returns true if the DOM element is visible, false if it's hidden.
	// Checks if display is anything other than none.
	isVisible: function (elem) {
		// shamelessly copied from jQuery
		return elem.offsetWidth > 0 || elem.offsetHeight > 0;
	},

	getStyle: function (elem, styleProp) {
		var y, s;
		if (elem.currentStyle) {
			y = elem.currentStyle[styleProp];
		} else if (window.getComputedStyle) {
      s = window.getComputedStyle(elem, null);
      y = s ? s[styleProp] : '';
		}
		return y;
	},

	domReady: function (f) {
		var state = document.readyState;
		if (state === 'complete' || state === 'interactive') {
			f();
		} else {
			setTimeout(function() { util.domReady(f); }, 9);
		}
	},

	// Adds a listener callback to a DOM element which is fired on a specified
	// event.  Callback is sent the event object and the element that triggered the event
	addEvent: function (elem, eventName, callback) {
		var listener = function (event) {
			event = event || window.event;
			var target = event.target || event.srcElement;
			var block = callback.apply(elem, [event, target]);
			if (block === false) {
				if (!!event.preventDefault) event.preventDefault();
				else {
					event.returnValue = false;
					event.cancelBubble = true;
				}
			}
			return block;
		};
		if (elem.attachEvent) { // IE only.  The "on" is mandatory.
			elem.attachEvent("on" + eventName, listener);
		} else { // Other browsers.
			elem.addEventListener(eventName, listener, false);
		}
		return listener;
	},

	// Removes a listener callback from a DOM element which is fired on a specified
	// event.
	removeEvent: function (elem, event, listener) {
		if (elem.detachEvent) {	// IE only.  The "on" is mandatory.
			elem.detachEvent("on" + event, listener);
		} else { // Other browsers.
			elem.removeEventListener(event, listener, false);
		}
	},

	fireEvent: function (elem, event) {
		if (document.createEvent) {
			var e = document.createEvent('HTMLEvents');
			e.initEvent(event, true, true);
			elem.dispatchEvent(e);
		} else if (document.createEventObject) {
			elem.fireEvent('on' + event) ;
		} else if (typeof elem['on' + event] == 'function' ) {
			elem['on' + event]();
		}
	},

	hasClassName: function(elem, className) { //copied and modified from Prototype.js
		if (!(elem = util.$(elem))) return false;
		var eClassName = elem.className;
		return (eClassName.length > 0 && (eClassName == className || new RegExp("(^|\\s)" + className + "(\\s|$)").test(eClassName)));
	},

	addClassName: function(elem, className) { //copied and modified from Prototype.js
		if (!(elem = util.$(elem))) return;
		if (!util.hasClassName(elem, className)) elem.className += (elem.className ? ' ' : '') + className;
	},

	removeClassName: function(elem, className) { //copied and modified from Prototype.js
		if (!(elem = util.$(elem))) return;
		elem.className = util.trimString(elem.className.replace(new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' '));
	},

	isFixed: function (elem) {
		do {
			if (util.getStyle(elem, 'position') === 'fixed') return true;
		} while ((elem = elem.offsetParent));
		return false;
	},

	scrollContainer: function (elem) {
		do {
			var overflow = util.getStyle(elem, 'overflow');
			if (overflow === 'auto' || overflow === 'scroll') return elem;
		} while ((elem = elem.parentNode) && elem != window.document.body);
		return null;
	},

	getPosition: function (elem, isInner) {
		var x = elem.offsetLeft,
			y = elem.offsetTop,
			r = {};

		if (!isInner) {
			while ((elem = elem.offsetParent)) {
				x += elem.offsetLeft;
				y += elem.offsetTop;
			}
		}

		r[0] = r.left = x;
		r[1] = r.top = y;
		return r;
	},

	getHeight: function (elem) {
		return elem.offsetHeight || elem.scrollHeight;
	},

	getWidth: function (elem) {
		return elem.offsetWidth || elem.scrollWidth;
	},


// TEXT FUNCTIONS

	trimString: function (input) {
		return input.replace(/^\s+/, '').replace(/\s+$/, '');
	},


// OBJECT FUNCTIONS

	merge: function () {
		/* Combines multiple objects into one.
		 * Syntax: util.extend([true], object1, object2, ... objectN)
		 * If first argument is true, function will merge recursively.
		 */

		var deep = (arguments[0]===true),
			d = {},
			i = deep?1:0;

		var _c = function (a, b) {
			if (typeof b !== 'object') return;
			for (var k in b) if (b.hasOwnProperty(k)) {
				//if property is an object or array, merge the contents instead of overwriting, if extend() was called as such
				if (deep && typeof a[k] === 'object' && typeof b[k] === 'object') _update(a[k], b[k]);
				else a[k] = b[k];
			}
			return a;
		};

		for (; i < arguments.length; i++) {
			_c(d, arguments[i]);
		}
		return d;
	},

	isArray: function (array) {
		return Object.prototype.toString.call(array) == "[object Array]";
	}
};


//auto-initializaiton code
if (typeof document.addEventListener === 'function') Kalendae.util.domReady(function () {
	var els = util.$$('.auto-kal'),
		i = els.length,
		e,
		options,
		optionsRaw;

	while (i--) {
		e = els[i];
		optionsRaw = e.getAttribute('data-kal');
		options = (optionsRaw == null || optionsRaw == "") ? {} : (new Function('return {' + optionsRaw + '};'))();

		if (e.tagName === 'INPUT') {
			//if element is an input, bind a popup calendar to the input.
			new Kalendae.Input(e, options);
		} else {
			//otherwise, insert a flat calendar into the element.
			new Kalendae(util.merge(options, {attachTo:e}));
		}

	}
});
Kalendae.Input = function (targetElement, options) {
	if (typeof document.addEventListener !== 'function'  && !util.isIE8()) return;

	var $input = this.input = util.$(targetElement),
		overwriteInput,
		$closeButton,
		changing = false;

	if (!$input || $input.tagName !== 'INPUT') throw "First argument for Kalendae.Input must be an <input> element or a valid element id.";

	var self = this,
		classes = self.classes,
		opts = self.settings = util.merge(self.defaults, options);

	this._events = {};

	//force attachment to the body
	opts.attachTo = window.document.body;

	//if no override provided, use the input's contents
	if (!opts.selected) opts.selected = $input.value;
	else overwriteInput = true;

	//call our parent constructor
	Kalendae.call(self, opts);

	//create the close button
	if (opts.closeButton) {
		$closeButton = util.make('a', {'class':classes.closeButton}, self.container);
		util.addEvent($closeButton, 'click', function () {
			$input.blur();
		});
	}

	if (overwriteInput) $input.value = self.getSelected();

	var $container = self.container,
		noclose = false;

	$container.style.display = 'none';
	util.addClassName($container, classes.positioned);

	this._events.containerMouseDown = util.addEvent($container, 'mousedown', function (event, target) {
		noclose = true; //IE8 doesn't obey event blocking when it comes to focusing, so we have to do this shit.
	});

	this._events.documentMousedown = util.addEvent(window.document, 'mousedown', function (event, target) {
		noclose = false;
	});

	this._events.inputFocus = util.addEvent($input, 'focus', function () {
		changing = true; // prevent setSelected from altering the input contents.
		self.setSelected(this.value);
		changing = false;
		self.show();
	});

	this._events.inputBlur = util.addEvent($input, 'blur', function () {
		if (noclose && util.isIE8()) {
			noclose = false;
			$input.focus();
		}
		else self.hide();
	});

	this._events.inputKeyup = util.addEvent($input, 'keyup', function (event) {
		changing = true; // prevent setSelected from altering the input contents.
		var dateValue = parseDates(this.value, self.settings.parseSplitDelimiter, self.settings.format);

		// If the date in the field is parsable as a valid date, update.  Otherwise deselect and show default view.
		if (dateValue && dateValue.length && dateValue[0] && dateValue[0].year() > 1000) {
			self.setSelected(this.value);
		} else {
			self.setSelected('', null);
			self.viewStartDate = moment(self.defaultView);
			self.draw();
		}
		changing = false;
	});

	var $scrollContainer = util.scrollContainer($input);

	if( $scrollContainer ) {

		// Hide calendar when $scrollContainer is scrolled
		util.addEvent($scrollContainer, 'scroll', function (event) {
			$input.blur();
		});
	}

	self.subscribe('change', function () {
		if (changing) {
			// the change event came from an internal modification, don't update the field contents
			return;
		}
		$input.value = self.getSelected();
		util.fireEvent($input, 'change');
	});

};

Kalendae.Input.prototype = util.merge(Kalendae.prototype, {
	defaults : util.merge(Kalendae.prototype.defaults, {
		format: 'MM/DD/YYYY',
		side: 'bottom',
		closeButton: true,
		offsetLeft: 0,
		offsetTop: 0
	}),
	classes : util.merge(Kalendae.prototype.classes, {
		positioned : 'k-floating',
		closeButton: 'k-btn-close'
	}),

	show : function () {
		var $container = this.container,
			style = $container.style,
			$input = this.input,
			pos = util.getPosition($input),
			$scrollContainer = util.scrollContainer($input),
			scrollTop = $scrollContainer ? $scrollContainer.scrollTop : 0,
			scrollLeft = $scrollContainer ? $scrollContainer.scrollLeft : 0,
			opts = this.settings;

		style.display = '';
		switch (opts.side) {
			case 'left':
				style.left = (pos.left - util.getWidth($container) + opts.offsetLeft - scrollLeft) + 'px';
				style.top  = (pos.top + opts.offsetTop - scrollTop) + 'px';
				break;
			case 'right':
				style.left = (pos.left + util.getWidth($input) - scrollLeft) + 'px';
				style.top  = (pos.top + opts.offsetTop - scrollTop) + 'px';
				break;
			case 'top':
				style.left = (pos.left + opts.offsetLeft - scrollLeft) + 'px';
				style.top  = (pos.top - util.getHeight($container) + opts.offsetTop - scrollTop) + 'px';
				break;
			case 'bottom right':
				style.left = (pos.left - util.getWidth($container) + util.getWidth($input) + opts.offsetLeft) + 'px';
				style.top  = (pos.top + util.getHeight($input) + opts.offsetTop - scrollTop) + 'px';
				break;
			case 'bottom':
				/* falls through */
			default:
				style.left = (pos.left + opts.offsetLeft - scrollLeft) + 'px';
				style.top  = (pos.top + util.getHeight($input) + opts.offsetTop - scrollTop) + 'px';
				break;
		}

		style.position = util.isFixed($input) ? 'fixed' : 'absolute';

		this.publish('show', this);
	},

	hide : function () {
		this.container.style.display = 'none';
		this.publish('hide', this);
	},

	destroy : function() {
		var $container = this.container;
		var $input = this.input;

		util.removeEvent($container, 'mousedown', this._events.containerMousedown);

		util.removeEvent(window.document, 'mousedown', this._events.documentMousedown);

		util.removeEvent($input, 'focus', this._events.inputFocus);

		util.removeEvent($input, 'blur', this._events.inputBlur);

		util.removeEvent($input, 'keyup', this._events.inputKeyup);

		if ($container.parentNode) {
			$container.parentNode.removeChild($container);
		}
	}
});


/*!
* MinPubSub, modified for use on Kalendae
* Copyright(c) 2011 Daniel Lamb <daniellmb.com>
* https://github.com/daniellmb/MinPubSub
* MIT Licensed
*/

var MinPubSub = function(d){

	if (!d) d = this;

	// the topic/subscription hash
	var cache = d.c_ || {}; //check for "c_" cache for unit testing

	d.publish = function(/* String */ topic, /* Object */ target, /* Array? */ args){
		// summary:
		//		Publish some data on a named topic.
		// topic: String
		//		The channel to publish on
		// args: Array?
		//		The data to publish. Each array item is converted into an ordered
		//		arguments on the subscribed functions.
		//
		// example:
		//		Publish stuff on '/some/topic'. Anything subscribed will be called
		//		with a function signature like: function(a,b,c){ ... }
		//
		//		publish("/some/topic", ["a","b","c"]);

		var subs = cache[topic],
			len = subs ? subs.length : 0,
			r;

		//can change loop or reverse array if the order matters
		while(len--){
			r = subs[len].apply(target, args || []);
			if (typeof r === 'boolean') return r;
		}
	};

	d.subscribe = function(/* String */ topic, /* Function */ callback, /* Boolean */ topPriority){
		// summary:
		//		Register a callback on a named topic.
		// topic: String
		//		The channel to subscribe to
		// callback: Function
		//		The handler event. Anytime something is publish'ed on a
		//		subscribed channel, the callback will be called with the
		//		published array as ordered arguments.
		//
		// returns: Array
		//		A handle which can be used to unsubscribe this particular subscription.
		//
		// example:
		//		subscribe("/some/topic", function(a, b, c){ /* handle data */ });

		if(!cache[topic]){
			cache[topic] = [];
		}
		if (topPriority)
			cache[topic].push(callback);
		else
			cache[topic].unshift(callback);
		return [topic, callback]; // Array
	};

	d.unsubscribe = function(/* Array */ handle){
		// summary:
		//		Disconnect a subscribed function for a topic.
		// handle: Array
		//		The return value from a subscribe call.
		// example:
		//		var handle = subscribe("/some/topic", function(){});
		//		unsubscribe(handle);

		var subs = cache[handle[0]],
			callback = handle[1],
			len = subs ? subs.length : 0;

		while(len--){
			if(subs[len] === callback){
				subs.splice(len, 1);
			}
		}
	};

};// moment.js
// version : 2.1.0
// author : Tim Wood
// license : MIT
// momentjs.com

(function (undefined) {

    /************************************
        Constants
    ************************************/

    var moment,
        VERSION = "2.1.0",
        round = Math.round, i,
        // internal storage for language config files
        languages = {},

        // check for nodeJS
        hasModule = (typeof module !== 'undefined' && module.exports),

        // ASP.NET json date format regex
        aspNetJsonRegex = /^\/?Date\((\-?\d+)/i,
        aspNetTimeSpanJsonRegex = /(\-)?(\d*)?\.?(\d+)\:(\d+)\:(\d+)\.?(\d{3})?/,

        // format tokens
        formattingTokens = /(\[[^\[]*\])|(\\)?(Mo|MM?M?M?|Do|DDDo|DD?D?D?|ddd?d?|do?|w[o|w]?|W[o|W]?|YYYYY|YYYY|YY|gg(ggg?)?|GG(GGG?)?|e|E|a|A|hh?|HH?|mm?|ss?|SS?S?|X|zz?|ZZ?|.)/g,
        localFormattingTokens = /(\[[^\[]*\])|(\\)?(LT|LL?L?L?|l{1,4})/g,

        // parsing token regexes
        parseTokenOneOrTwoDigits = /\d\d?/, // 0 - 99
        parseTokenOneToThreeDigits = /\d{1,3}/, // 0 - 999
        parseTokenThreeDigits = /\d{3}/, // 000 - 999
        parseTokenFourDigits = /\d{1,4}/, // 0 - 9999
        parseTokenSixDigits = /[+\-]?\d{1,6}/, // -999,999 - 999,999
        parseTokenWord = /[0-9]*['a-z\u00A0-\u05FF\u0700-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]+|[\u0600-\u06FF\/]+(\s*?[\u0600-\u06FF]+){1,2}/i, // any word (or two) characters or numbers including two/three word month in arabic.
        parseTokenTimezone = /Z|[\+\-]\d\d:?\d\d/i, // +00:00 -00:00 +0000 -0000 or Z
        parseTokenT = /T/i, // T (ISO seperator)
        parseTokenTimestampMs = /[\+\-]?\d+(\.\d{1,3})?/, // 123456789 123456789.123

        // preliminary iso regex
        // 0000-00-00 + T + 00 or 00:00 or 00:00:00 or 00:00:00.000 + +00:00 or +0000
        isoRegex = /^\s*\d{4}-\d\d-\d\d((T| )(\d\d(:\d\d(:\d\d(\.\d\d?\d?)?)?)?)?([\+\-]\d\d:?\d\d)?)?/,
        isoFormat = 'YYYY-MM-DDTHH:mm:ssZ',

        // iso time formats and regexes
        isoTimes = [
            ['HH:mm:ss.S', /(T| )\d\d:\d\d:\d\d\.\d{1,3}/],
            ['HH:mm:ss', /(T| )\d\d:\d\d:\d\d/],
            ['HH:mm', /(T| )\d\d:\d\d/],
            ['HH', /(T| )\d\d/]
        ],

        // timezone chunker "+10:00" > ["10", "00"] or "-1530" > ["-15", "30"]
        parseTimezoneChunker = /([\+\-]|\d\d)/gi,

        // getter and setter names
        proxyGettersAndSetters = 'Date|Hours|Minutes|Seconds|Milliseconds'.split('|'),
        unitMillisecondFactors = {
            'Milliseconds' : 1,
            'Seconds' : 1e3,
            'Minutes' : 6e4,
            'Hours' : 36e5,
            'Days' : 864e5,
            'Months' : 2592e6,
            'Years' : 31536e6
        },

        unitAliases = {
            ms : 'millisecond',
            s : 'second',
            m : 'minute',
            h : 'hour',
            d : 'day',
            w : 'week',
            M : 'month',
            y : 'year'
        },

        // format function strings
        formatFunctions = {},

        // tokens to ordinalize and pad
        ordinalizeTokens = 'DDD w W M D d'.split(' '),
        paddedTokens = 'M D H h m s w W'.split(' '),

        formatTokenFunctions = {
            M    : function () {
                return this.month() + 1;
            },
            MMM  : function (format) {
                return this.lang().monthsShort(this, format);
            },
            MMMM : function (format) {
                return this.lang().months(this, format);
            },
            D    : function () {
                return this.date();
            },
            DDD  : function () {
                return this.dayOfYear();
            },
            d    : function () {
                return this.day();
            },
            dd   : function (format) {
                return this.lang().weekdaysMin(this, format);
            },
            ddd  : function (format) {
                return this.lang().weekdaysShort(this, format);
            },
            dddd : function (format) {
                return this.lang().weekdays(this, format);
            },
            w    : function () {
                return this.week();
            },
            W    : function () {
                return this.isoWeek();
            },
            YY   : function () {
                return leftZeroFill(this.year() % 100, 2);
            },
            YYYY : function () {
                return leftZeroFill(this.year(), 4);
            },
            YYYYY : function () {
                return leftZeroFill(this.year(), 5);
            },
            gg   : function () {
                return leftZeroFill(this.weekYear() % 100, 2);
            },
            gggg : function () {
                return this.weekYear();
            },
            ggggg : function () {
                return leftZeroFill(this.weekYear(), 5);
            },
            GG   : function () {
                return leftZeroFill(this.isoWeekYear() % 100, 2);
            },
            GGGG : function () {
                return this.isoWeekYear();
            },
            GGGGG : function () {
                return leftZeroFill(this.isoWeekYear(), 5);
            },
            e : function () {
                return this.weekday();
            },
            E : function () {
                return this.isoWeekday();
            },
            a    : function () {
                return this.lang().meridiem(this.hours(), this.minutes(), true);
            },
            A    : function () {
                return this.lang().meridiem(this.hours(), this.minutes(), false);
            },
            H    : function () {
                return this.hours();
            },
            h    : function () {
                return this.hours() % 12 || 12;
            },
            m    : function () {
                return this.minutes();
            },
            s    : function () {
                return this.seconds();
            },
            S    : function () {
                return ~~(this.milliseconds() / 100);
            },
            SS   : function () {
                return leftZeroFill(~~(this.milliseconds() / 10), 2);
            },
            SSS  : function () {
                return leftZeroFill(this.milliseconds(), 3);
            },
            Z    : function () {
                var a = -this.zone(),
                    b = "+";
                if (a < 0) {
                    a = -a;
                    b = "-";
                }
                return b + leftZeroFill(~~(a / 60), 2) + ":" + leftZeroFill(~~a % 60, 2);
            },
            ZZ   : function () {
                var a = -this.zone(),
                    b = "+";
                if (a < 0) {
                    a = -a;
                    b = "-";
                }
                return b + leftZeroFill(~~(10 * a / 6), 4);
            },
            z : function () {
                return this.zoneAbbr();
            },
            zz : function () {
                return this.zoneName();
            },
            X    : function () {
                return this.unix();
            }
        };

    function padToken(func, count) {
        return function (a) {
            return leftZeroFill(func.call(this, a), count);
        };
    }
    function ordinalizeToken(func, period) {
        return function (a) {
            return this.lang().ordinal(func.call(this, a), period);
        };
    }

    while (ordinalizeTokens.length) {
        i = ordinalizeTokens.pop();
        formatTokenFunctions[i + 'o'] = ordinalizeToken(formatTokenFunctions[i], i);
    }
    while (paddedTokens.length) {
        i = paddedTokens.pop();
        formatTokenFunctions[i + i] = padToken(formatTokenFunctions[i], 2);
    }
    formatTokenFunctions.DDDD = padToken(formatTokenFunctions.DDD, 3);


    /************************************
        Constructors
    ************************************/

    function Language() {

    }

    // Moment prototype object
    function Moment(config) {
        extend(this, config);
    }

    // Duration Constructor
    function Duration(duration) {
        var years = duration.years || duration.year || duration.y || 0,
            months = duration.months || duration.month || duration.M || 0,
            weeks = duration.weeks || duration.week || duration.w || 0,
            days = duration.days || duration.day || duration.d || 0,
            hours = duration.hours || duration.hour || duration.h || 0,
            minutes = duration.minutes || duration.minute || duration.m || 0,
            seconds = duration.seconds || duration.second || duration.s || 0,
            milliseconds = duration.milliseconds || duration.millisecond || duration.ms || 0;

        // store reference to input for deterministic cloning
        this._input = duration;

        // representation for dateAddRemove
        this._milliseconds = milliseconds +
            seconds * 1e3 + // 1000
            minutes * 6e4 + // 1000 * 60
            hours * 36e5; // 1000 * 60 * 60
        // Because of dateAddRemove treats 24 hours as different from a
        // day when working around DST, we need to store them separately
        this._days = days +
            weeks * 7;
        // It is impossible translate months into days without knowing
        // which months you are are talking about, so we have to store
        // it separately.
        this._months = months +
            years * 12;

        this._data = {};

        this._bubble();
    }


    /************************************
        Helpers
    ************************************/


    function extend(a, b) {
        for (var i in b) {
            if (b.hasOwnProperty(i)) {
                a[i] = b[i];
            }
        }
        return a;
    }

    function absRound(number) {
        if (number < 0) {
            return Math.ceil(number);
        } else {
            return Math.floor(number);
        }
    }

    // left zero fill a number
    // see http://jsperf.com/left-zero-filling for performance comparison
    function leftZeroFill(number, targetLength) {
        var output = number + '';
        while (output.length < targetLength) {
            output = '0' + output;
        }
        return output;
    }

    // helper function for _.addTime and _.subtractTime
    function addOrSubtractDurationFromMoment(mom, duration, isAdding, ignoreUpdateOffset) {
        var milliseconds = duration._milliseconds,
            days = duration._days,
            months = duration._months,
            minutes,
            hours,
            currentDate;

        if (milliseconds) {
            mom._d.setTime(+mom._d + milliseconds * isAdding);
        }
        // store the minutes and hours so we can restore them
        if (days || months) {
            minutes = mom.minute();
            hours = mom.hour();
        }
        if (days) {
            mom.date(mom.date() + days * isAdding);
        }
        if (months) {
            mom.month(mom.month() + months * isAdding);
        }
        if (milliseconds && !ignoreUpdateOffset) {
            moment.updateOffset(mom);
        }
        // restore the minutes and hours after possibly changing dst
        if (days || months) {
            mom.minute(minutes);
            mom.hour(hours);
        }
    }

    // check if is an array
    function isArray(input) {
        return Object.prototype.toString.call(input) === '[object Array]';
    }

    // compare two arrays, return the number of differences
    function compareArrays(array1, array2) {
        var len = Math.min(array1.length, array2.length),
            lengthDiff = Math.abs(array1.length - array2.length),
            diffs = 0,
            i;
        for (i = 0; i < len; i++) {
            if (~~array1[i] !== ~~array2[i]) {
                diffs++;
            }
        }
        return diffs + lengthDiff;
    }

    function normalizeUnits(units) {
        return units ? unitAliases[units] || units.toLowerCase().replace(/(.)s$/, '$1') : units;
    }


    /************************************
        Languages
    ************************************/


    Language.prototype = {
        set : function (config) {
            var prop, i;
            for (i in config) {
                prop = config[i];
                if (typeof prop === 'function') {
                    this[i] = prop;
                } else {
                    this['_' + i] = prop;
                }
            }
        },

        _months : "January_February_March_April_May_June_July_August_September_October_November_December".split("_"),
        months : function (m) {
            return this._months[m.month()];
        },

        _monthsShort : "Jan_Feb_Mar_Apr_May_Jun_Jul_Aug_Sep_Oct_Nov_Dec".split("_"),
        monthsShort : function (m) {
            return this._monthsShort[m.month()];
        },

        monthsParse : function (monthName) {
            var i, mom, regex;

            if (!this._monthsParse) {
                this._monthsParse = [];
            }

            for (i = 0; i < 12; i++) {
                // make the regex if we don't have it already
                if (!this._monthsParse[i]) {
                    mom = moment([2000, i]);
                    regex = '^' + this.months(mom, '') + '|^' + this.monthsShort(mom, '');
                    this._monthsParse[i] = new RegExp(regex.replace('.', ''), 'i');
                }
                // test the regex
                if (this._monthsParse[i].test(monthName)) {
                    return i;
                }
            }
        },

        _weekdays : "Sunday_Monday_Tuesday_Wednesday_Thursday_Friday_Saturday".split("_"),
        weekdays : function (m) {
            return this._weekdays[m.day()];
        },

        _weekdaysShort : "Sun_Mon_Tue_Wed_Thu_Fri_Sat".split("_"),
        weekdaysShort : function (m) {
            return this._weekdaysShort[m.day()];
        },

        _weekdaysMin : "Su_Mo_Tu_We_Th_Fr_Sa".split("_"),
        weekdaysMin : function (m) {
            return this._weekdaysMin[m.day()];
        },

        weekdaysParse : function (weekdayName) {
            var i, mom, regex;

            if (!this._weekdaysParse) {
                this._weekdaysParse = [];
            }

            for (i = 0; i < 7; i++) {
                // make the regex if we don't have it already
                if (!this._weekdaysParse[i]) {
                    mom = moment([2000, 1]).day(i);
                    regex = '^' + this.weekdays(mom, '') + '|^' + this.weekdaysShort(mom, '') + '|^' + this.weekdaysMin(mom, '');
                    this._weekdaysParse[i] = new RegExp(regex.replace('.', ''), 'i');
                }
                // test the regex
                if (this._weekdaysParse[i].test(weekdayName)) {
                    return i;
                }
            }
        },

        _longDateFormat : {
            LT : "h:mm A",
            L : "MM/DD/YYYY",
            LL : "MMMM D YYYY",
            LLL : "MMMM D YYYY LT",
            LLLL : "dddd, MMMM D YYYY LT"
        },
        longDateFormat : function (key) {
            var output = this._longDateFormat[key];
            if (!output && this._longDateFormat[key.toUpperCase()]) {
                output = this._longDateFormat[key.toUpperCase()].replace(/MMMM|MM|DD|dddd/g, function (val) {
                    return val.slice(1);
                });
                this._longDateFormat[key] = output;
            }
            return output;
        },

        isPM : function (input) {
            return ((input + '').toLowerCase()[0] === 'p');
        },

        _meridiemParse : /[ap]\.?m?\.?/i,
        meridiem : function (hours, minutes, isLower) {
            if (hours > 11) {
                return isLower ? 'pm' : 'PM';
            } else {
                return isLower ? 'am' : 'AM';
            }
        },

        _calendar : {
            sameDay : '[Today at] LT',
            nextDay : '[Tomorrow at] LT',
            nextWeek : 'dddd [at] LT',
            lastDay : '[Yesterday at] LT',
            lastWeek : '[Last] dddd [at] LT',
            sameElse : 'L'
        },
        calendar : function (key, mom) {
            var output = this._calendar[key];
            return typeof output === 'function' ? output.apply(mom) : output;
        },

        _relativeTime : {
            future : "in %s",
            past : "%s ago",
            s : "a few seconds",
            m : "a minute",
            mm : "%d minutes",
            h : "an hour",
            hh : "%d hours",
            d : "a day",
            dd : "%d days",
            M : "a month",
            MM : "%d months",
            y : "a year",
            yy : "%d years"
        },
        relativeTime : function (number, withoutSuffix, string, isFuture) {
            var output = this._relativeTime[string];
            return (typeof output === 'function') ?
                output(number, withoutSuffix, string, isFuture) :
                output.replace(/%d/i, number);
        },
        pastFuture : function (diff, output) {
            var format = this._relativeTime[diff > 0 ? 'future' : 'past'];
            return typeof format === 'function' ? format(output) : format.replace(/%s/i, output);
        },

        ordinal : function (number) {
            return this._ordinal.replace("%d", number);
        },
        _ordinal : "%d",

        preparse : function (string) {
            return string;
        },

        postformat : function (string) {
            return string;
        },

        week : function (mom) {
            return weekOfYear(mom, this._week.dow, this._week.doy).week;
        },
        _week : {
            dow : 0, // Sunday is the first day of the week.
            doy : 6  // The week that contains Jan 1st is the first week of the year.
        }
    };

    // Loads a language definition into the `languages` cache.  The function
    // takes a key and optionally values.  If not in the browser and no values
    // are provided, it will load the language file module.  As a convenience,
    // this function also returns the language values.
    function loadLang(key, values) {
        values.abbr = key;
        if (!languages[key]) {
            languages[key] = new Language();
        }
        languages[key].set(values);
        return languages[key];
    }

    // Determines which language definition to use and returns it.
    //
    // With no parameters, it will return the global language.  If you
    // pass in a language key, such as 'en', it will return the
    // definition for 'en', so long as 'en' has already been loaded using
    // moment.lang.
    function getLangDefinition(key) {
        if (!key) {
            return moment.fn._lang;
        }
        if (!languages[key] && hasModule) {
            try {
                require('./lang/' + key);
            } catch (e) {
                // call with no params to set to default
                return moment.fn._lang;
            }
        }
        return languages[key];
    }


    /************************************
        Formatting
    ************************************/


    function removeFormattingTokens(input) {
        if (input.match(/\[.*\]/)) {
            return input.replace(/^\[|\]$/g, "");
        }
        return input.replace(/\\/g, "");
    }

    function makeFormatFunction(format) {
        var array = format.match(formattingTokens), i, length;

        for (i = 0, length = array.length; i < length; i++) {
            if (formatTokenFunctions[array[i]]) {
                array[i] = formatTokenFunctions[array[i]];
            } else {
                array[i] = removeFormattingTokens(array[i]);
            }
        }

        return function (mom) {
            var output = "";
            for (i = 0; i < length; i++) {
                output += array[i] instanceof Function ? array[i].call(mom, format) : array[i];
            }
            return output;
        };
    }

    // format date using native date object
    function formatMoment(m, format) {
        var i = 5;

        function replaceLongDateFormatTokens(input) {
            return m.lang().longDateFormat(input) || input;
        }

        while (i-- && localFormattingTokens.test(format)) {
            format = format.replace(localFormattingTokens, replaceLongDateFormatTokens);
        }

        if (!formatFunctions[format]) {
            formatFunctions[format] = makeFormatFunction(format);
        }

        return formatFunctions[format](m);
    }


    /************************************
        Parsing
    ************************************/


    // get the regex to find the next token
    function getParseRegexForToken(token, config) {
        switch (token) {
        case 'DDDD':
            return parseTokenThreeDigits;
        case 'YYYY':
            return parseTokenFourDigits;
        case 'YYYYY':
            return parseTokenSixDigits;
        case 'S':
        case 'SS':
        case 'SSS':
        case 'DDD':
            return parseTokenOneToThreeDigits;
        case 'MMM':
        case 'MMMM':
        case 'dd':
        case 'ddd':
        case 'dddd':
            return parseTokenWord;
        case 'a':
        case 'A':
            return getLangDefinition(config._l)._meridiemParse;
        case 'X':
            return parseTokenTimestampMs;
        case 'Z':
        case 'ZZ':
            return parseTokenTimezone;
        case 'T':
            return parseTokenT;
        case 'MM':
        case 'DD':
        case 'YY':
        case 'HH':
        case 'hh':
        case 'mm':
        case 'ss':
        case 'M':
        case 'D':
        case 'd':
        case 'H':
        case 'h':
        case 'm':
        case 's':
            return parseTokenOneOrTwoDigits;
        default :
            return new RegExp(token.replace('\\', ''));
        }
    }

    function timezoneMinutesFromString(string) {
        var tzchunk = (parseTokenTimezone.exec(string) || [])[0],
            parts = (tzchunk + '').match(parseTimezoneChunker) || ['-', 0, 0],
            minutes = +(parts[1] * 60) + ~~parts[2];

        return parts[0] === '+' ? -minutes : minutes;
    }

    // function to convert string input to date
    function addTimeToArrayFromToken(token, input, config) {
        var a, datePartArray = config._a;

        switch (token) {
        // MONTH
        case 'M' : // fall through to MM
        case 'MM' :
            datePartArray[1] = (input == null) ? 0 : ~~input - 1;
            break;
        case 'MMM' : // fall through to MMMM
        case 'MMMM' :
            a = getLangDefinition(config._l).monthsParse(input);
            // if we didn't find a month name, mark the date as invalid.
            if (a != null) {
                datePartArray[1] = a;
            } else {
                config._isValid = false;
            }
            break;
        // DAY OF MONTH
        case 'D' : // fall through to DDDD
        case 'DD' : // fall through to DDDD
        case 'DDD' : // fall through to DDDD
        case 'DDDD' :
            if (input != null) {
                datePartArray[2] = ~~input;
            }
            break;
        // YEAR
        case 'YY' :
            datePartArray[0] = ~~input + (~~input > 68 ? 1900 : 2000);
            break;
        case 'YYYY' :
        case 'YYYYY' :
            datePartArray[0] = ~~input;
            break;
        // AM / PM
        case 'a' : // fall through to A
        case 'A' :
            config._isPm = getLangDefinition(config._l).isPM(input);
            break;
        // 24 HOUR
        case 'H' : // fall through to hh
        case 'HH' : // fall through to hh
        case 'h' : // fall through to hh
        case 'hh' :
            datePartArray[3] = ~~input;
            break;
        // MINUTE
        case 'm' : // fall through to mm
        case 'mm' :
            datePartArray[4] = ~~input;
            break;
        // SECOND
        case 's' : // fall through to ss
        case 'ss' :
            datePartArray[5] = ~~input;
            break;
        // MILLISECOND
        case 'S' :
        case 'SS' :
        case 'SSS' :
            datePartArray[6] = ~~ (('0.' + input) * 1000);
            break;
        // UNIX TIMESTAMP WITH MS
        case 'X':
            config._d = new Date(parseFloat(input) * 1000);
            break;
        // TIMEZONE
        case 'Z' : // fall through to ZZ
        case 'ZZ' :
            config._useUTC = true;
            config._tzm = timezoneMinutesFromString(input);
            break;
        }

        // if the input is null, the date is not valid
        if (input == null) {
            config._isValid = false;
        }
    }

    // convert an array to a date.
    // the array should mirror the parameters below
    // note: all values past the year are optional and will default to the lowest possible value.
    // [year, month, day , hour, minute, second, millisecond]
    function dateFromArray(config) {
        var i, date, input = [];

        if (config._d) {
            return;
        }

        for (i = 0; i < 7; i++) {
            config._a[i] = input[i] = (config._a[i] == null) ? (i === 2 ? 1 : 0) : config._a[i];
        }

        // add the offsets to the time to be parsed so that we can have a clean array for checking isValid
        input[3] += ~~((config._tzm || 0) / 60);
        input[4] += ~~((config._tzm || 0) % 60);

        date = new Date(0);

        if (config._useUTC) {
            date.setUTCFullYear(input[0], input[1], input[2]);
            date.setUTCHours(input[3], input[4], input[5], input[6]);
        } else {
            date.setFullYear(input[0], input[1], input[2]);
            date.setHours(input[3], input[4], input[5], input[6]);
        }

        config._d = date;
    }

    // date from string and format string
    function makeDateFromStringAndFormat(config) {
        // This array is used to make a Date, either with `new Date` or `Date.UTC`
        var tokens = config._f.match(formattingTokens),
            string = config._i,
            i, parsedInput;

        config._a = [];

        for (i = 0; i < tokens.length; i++) {
            parsedInput = (getParseRegexForToken(tokens[i], config).exec(string) || [])[0];
            if (parsedInput) {
                string = string.slice(string.indexOf(parsedInput) + parsedInput.length);
            }
            // don't parse if its not a known token
            if (formatTokenFunctions[tokens[i]]) {
                addTimeToArrayFromToken(tokens[i], parsedInput, config);
            }
        }

        // add remaining unparsed input to the string
        if (string) {
            config._il = string;
        }

        // handle am pm
        if (config._isPm && config._a[3] < 12) {
            config._a[3] += 12;
        }
        // if is 12 am, change hours to 0
        if (config._isPm === false && config._a[3] === 12) {
            config._a[3] = 0;
        }
        // return
        dateFromArray(config);
    }

    // date from string and array of format strings
    function makeDateFromStringAndArray(config) {
        var tempConfig,
            tempMoment,
            bestMoment,

            scoreToBeat = 99,
            i,
            currentScore;

        for (i = 0; i < config._f.length; i++) {
            tempConfig = extend({}, config);
            tempConfig._f = config._f[i];
            makeDateFromStringAndFormat(tempConfig);
            tempMoment = new Moment(tempConfig);

            currentScore = compareArrays(tempConfig._a, tempMoment.toArray());

            // if there is any input that was not parsed
            // add a penalty for that format
            if (tempMoment._il) {
                currentScore += tempMoment._il.length;
            }

            if (currentScore < scoreToBeat) {
                scoreToBeat = currentScore;
                bestMoment = tempMoment;
            }
        }

        extend(config, bestMoment);
    }

    // date from iso format
    function makeDateFromString(config) {
        var i,
            string = config._i,
            match = isoRegex.exec(string);

        if (match) {
            // match[2] should be "T" or undefined
            config._f = 'YYYY-MM-DD' + (match[2] || " ");
            for (i = 0; i < 4; i++) {
                if (isoTimes[i][1].exec(string)) {
                    config._f += isoTimes[i][0];
                    break;
                }
            }
            if (parseTokenTimezone.exec(string)) {
                config._f += " Z";
            }
            makeDateFromStringAndFormat(config);
        } else {
            config._d = new Date(string);
        }
    }

    function makeDateFromInput(config) {
        var input = config._i,
            matched = aspNetJsonRegex.exec(input);

        if (input === undefined) {
            config._d = new Date();
        } else if (matched) {
            config._d = new Date(+matched[1]);
        } else if (typeof input === 'string') {
            makeDateFromString(config);
        } else if (isArray(input)) {
            config._a = input.slice(0);
            dateFromArray(config);
        } else {
            config._d = input instanceof Date ? new Date(+input) : new Date(input);
        }
    }


    /************************************
        Relative Time
    ************************************/


    // helper function for moment.fn.from, moment.fn.fromNow, and moment.duration.fn.humanize
    function substituteTimeAgo(string, number, withoutSuffix, isFuture, lang) {
        return lang.relativeTime(number || 1, !!withoutSuffix, string, isFuture);
    }

    function relativeTime(milliseconds, withoutSuffix, lang) {
        var seconds = round(Math.abs(milliseconds) / 1000),
            minutes = round(seconds / 60),
            hours = round(minutes / 60),
            days = round(hours / 24),
            years = round(days / 365),
            args = seconds < 45 && ['s', seconds] ||
                minutes === 1 && ['m'] ||
                minutes < 45 && ['mm', minutes] ||
                hours === 1 && ['h'] ||
                hours < 22 && ['hh', hours] ||
                days === 1 && ['d'] ||
                days <= 25 && ['dd', days] ||
                days <= 45 && ['M'] ||
                days < 345 && ['MM', round(days / 30)] ||
                years === 1 && ['y'] || ['yy', years];
        args[2] = withoutSuffix;
        args[3] = milliseconds > 0;
        args[4] = lang;
        return substituteTimeAgo.apply({}, args);
    }


    /************************************
        Week of Year
    ************************************/


    // firstDayOfWeek       0 = sun, 6 = sat
    //                      the day of the week that starts the week
    //                      (usually sunday or monday)
    // firstDayOfWeekOfYear 0 = sun, 6 = sat
    //                      the first week is the week that contains the first
    //                      of this day of the week
    //                      (eg. ISO weeks use thursday (4))
    function weekOfYear(mom, firstDayOfWeek, firstDayOfWeekOfYear) {
        var end = firstDayOfWeekOfYear - firstDayOfWeek,
            daysToDayOfWeek = firstDayOfWeekOfYear - mom.day(),
            adjustedMoment;


        if (daysToDayOfWeek > end) {
            daysToDayOfWeek -= 7;
        }

        if (daysToDayOfWeek < end - 7) {
            daysToDayOfWeek += 7;
        }

        adjustedMoment = moment(mom).add('d', daysToDayOfWeek);
        return {
            week: Math.ceil(adjustedMoment.dayOfYear() / 7),
            year: adjustedMoment.year()
        };
    }


    /************************************
        Top Level Functions
    ************************************/

    function makeMoment(config) {
        var input = config._i,
            format = config._f;

        if (input === null || input === '') {
            return null;
        }

        if (typeof input === 'string') {
            config._i = input = getLangDefinition().preparse(input);
        }

        if (moment.isMoment(input)) {
            config = extend({}, input);
            config._d = new Date(+input._d);
        } else if (format) {
            if (isArray(format)) {
                makeDateFromStringAndArray(config);
            } else {
                makeDateFromStringAndFormat(config);
            }
        } else {
            makeDateFromInput(config);
        }

        return new Moment(config);
    }

    moment = function (input, format, lang) {
        return makeMoment({
            _i : input,
            _f : format,
            _l : lang,
            _isUTC : false
        });
    };

    // creating with utc
    moment.utc = function (input, format, lang) {
        return makeMoment({
            _useUTC : true,
            _isUTC : true,
            _l : lang,
            _i : input,
            _f : format
        });
    };

    // creating with unix timestamp (in seconds)
    moment.unix = function (input) {
        return moment(input * 1000);
    };

    // duration
    moment.duration = function (input, key) {
        var isDuration = moment.isDuration(input),
            isNumber = (typeof input === 'number'),
            duration = (isDuration ? input._input : (isNumber ? {} : input)),
            matched = aspNetTimeSpanJsonRegex.exec(input),
            sign,
            ret;

        if (isNumber) {
            if (key) {
                duration[key] = input;
            } else {
                duration.milliseconds = input;
            }
        } else if (matched) {
            sign = (matched[1] === "-") ? -1 : 1;
            duration = {
                y: 0,
                d: ~~matched[2] * sign,
                h: ~~matched[3] * sign,
                m: ~~matched[4] * sign,
                s: ~~matched[5] * sign,
                ms: ~~matched[6] * sign
            };
        }

        ret = new Duration(duration);

        if (isDuration && input.hasOwnProperty('_lang')) {
            ret._lang = input._lang;
        }

        return ret;
    };

    // version number
    moment.version = VERSION;

    // default format
    moment.defaultFormat = isoFormat;

    // This function will be called whenever a moment is mutated.
    // It is intended to keep the offset in sync with the timezone.
    moment.updateOffset = function () {};

    // This function will load languages and then set the global language.  If
    // no arguments are passed in, it will simply return the current global
    // language key.
    moment.lang = function (key, values) {
        if (!key) {
            return moment.fn._lang._abbr;
        }
        if (values) {
            loadLang(key, values);
        } else if (!languages[key]) {
            getLangDefinition(key);
        }
        moment.duration.fn._lang = moment.fn._lang = getLangDefinition(key);
    };

    // returns language data
    moment.langData = function (key) {
        if (key && key._lang && key._lang._abbr) {
            key = key._lang._abbr;
        }
        return getLangDefinition(key);
    };

    // compare moment object
    moment.isMoment = function (obj) {
        return obj instanceof Moment;
    };

    // for typechecking Duration objects
    moment.isDuration = function (obj) {
        return obj instanceof Duration;
    };


    /************************************
        Moment Prototype
    ************************************/


    moment.fn = Moment.prototype = {

        clone : function () {
            return moment(this);
        },

        valueOf : function () {
            return +this._d + ((this._offset || 0) * 60000);
        },

        unix : function () {
            return Math.floor(+this / 1000);
        },

        toString : function () {
            return this.format("ddd MMM DD YYYY HH:mm:ss [GMT]ZZ");
        },

        toDate : function () {
            return this._offset ? new Date(+this) : this._d;
        },

        toISOString : function () {
            return formatMoment(moment(this).utc(), 'YYYY-MM-DD[T]HH:mm:ss.SSS[Z]');
        },

        toArray : function () {
            var m = this;
            return [
                m.year(),
                m.month(),
                m.date(),
                m.hours(),
                m.minutes(),
                m.seconds(),
                m.milliseconds()
            ];
        },

        isValid : function () {
            if (this._isValid == null) {
                if (this._a) {
                    this._isValid = !compareArrays(this._a, (this._isUTC ? moment.utc(this._a) : moment(this._a)).toArray());
                } else {
                    this._isValid = !isNaN(this._d.getTime());
                }
            }
            return !!this._isValid;
        },

        utc : function () {
            return this.zone(0);
        },

        local : function () {
            this.zone(0);
            this._isUTC = false;
            return this;
        },

        format : function (inputString) {
            var output = formatMoment(this, inputString || moment.defaultFormat);
            return this.lang().postformat(output);
        },

        add : function (input, val) {
            var dur;
            // switch args to support add('s', 1) and add(1, 's')
            if (typeof input === 'string') {
                dur = moment.duration(+val, input);
            } else {
                dur = moment.duration(input, val);
            }
            addOrSubtractDurationFromMoment(this, dur, 1);
            return this;
        },

        subtract : function (input, val) {
            var dur;
            // switch args to support subtract('s', 1) and subtract(1, 's')
            if (typeof input === 'string') {
                dur = moment.duration(+val, input);
            } else {
                dur = moment.duration(input, val);
            }
            addOrSubtractDurationFromMoment(this, dur, -1);
            return this;
        },

        diff : function (input, units, asFloat) {
            var that = this._isUTC ? moment(input).zone(this._offset || 0) : moment(input).local(),
                zoneDiff = (this.zone() - that.zone()) * 6e4,
                diff, output;

            units = normalizeUnits(units);

            if (units === 'year' || units === 'month') {
                // average number of days in the months in the given dates
                diff = (this.daysInMonth() + that.daysInMonth()) * 432e5; // 24 * 60 * 60 * 1000 / 2
                // difference in months
                output = ((this.year() - that.year()) * 12) + (this.month() - that.month());
                // adjust by taking difference in days, average number of days
                // and dst in the given months.
                output += ((this - moment(this).startOf('month')) -
                        (that - moment(that).startOf('month'))) / diff;
                // same as above but with zones, to negate all dst
                output -= ((this.zone() - moment(this).startOf('month').zone()) -
                        (that.zone() - moment(that).startOf('month').zone())) * 6e4 / diff;
                if (units === 'year') {
                    output = output / 12;
                }
            } else {
                diff = (this - that);
                output = units === 'second' ? diff / 1e3 : // 1000
                    units === 'minute' ? diff / 6e4 : // 1000 * 60
                    units === 'hour' ? diff / 36e5 : // 1000 * 60 * 60
                    units === 'day' ? (diff - zoneDiff) / 864e5 : // 1000 * 60 * 60 * 24, negate dst
                    units === 'week' ? (diff - zoneDiff) / 6048e5 : // 1000 * 60 * 60 * 24 * 7, negate dst
                    diff;
            }
            return asFloat ? output : absRound(output);
        },

        from : function (time, withoutSuffix) {
            return moment.duration(this.diff(time)).lang(this.lang()._abbr).humanize(!withoutSuffix);
        },

        fromNow : function (withoutSuffix) {
            return this.from(moment(), withoutSuffix);
        },

        calendar : function () {
            var diff = this.diff(moment().startOf('day'), 'days', true),
                format = diff < -6 ? 'sameElse' :
                diff < -1 ? 'lastWeek' :
                diff < 0 ? 'lastDay' :
                diff < 1 ? 'sameDay' :
                diff < 2 ? 'nextDay' :
                diff < 7 ? 'nextWeek' : 'sameElse';
            return this.format(this.lang().calendar(format, this));
        },

        isLeapYear : function () {
            var year = this.year();
            return (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0;
        },

        isDST : function () {
            return (this.zone() < this.clone().month(0).zone() ||
                this.zone() < this.clone().month(5).zone());
        },

        day : function (input) {
            var day = this._isUTC ? this._d.getUTCDay() : this._d.getDay();
            if (input != null) {
                if (typeof input === 'string') {
                    input = this.lang().weekdaysParse(input);
                    if (typeof input !== 'number') {
                        return this;
                    }
                }
                return this.add({ d : input - day });
            } else {
                return day;
            }
        },

        month : function (input) {
            var utc = this._isUTC ? 'UTC' : '',
                dayOfMonth,
                daysInMonth;

            if (input != null) {
                if (typeof input === 'string') {
                    input = this.lang().monthsParse(input);
                    if (typeof input !== 'number') {
                        return this;
                    }
                }

                dayOfMonth = this.date();
                this.date(1);
                this._d['set' + utc + 'Month'](input);
                this.date(Math.min(dayOfMonth, this.daysInMonth()));

                moment.updateOffset(this);
                return this;
            } else {
                return this._d['get' + utc + 'Month']();
            }
        },

        startOf: function (units) {
            units = normalizeUnits(units);
            // the following switch intentionally omits break keywords
            // to utilize falling through the cases.
            switch (units) {
            case 'year':
                this.month(0);
                /* falls through */
            case 'month':
                this.date(1);
                /* falls through */
            case 'week':
            case 'day':
                this.hours(0);
                /* falls through */
            case 'hour':
                this.minutes(0);
                /* falls through */
            case 'minute':
                this.seconds(0);
                /* falls through */
            case 'second':
                this.milliseconds(0);
                /* falls through */
            }

            // weeks are a special case
            if (units === 'week') {
                this.weekday(0);
            }

            return this;
        },

        endOf: function (units) {
            return this.startOf(units).add(units, 1).subtract('ms', 1);
        },

        isAfter: function (input, units) {
            units = typeof units !== 'undefined' ? units : 'millisecond';
            return +this.clone().startOf(units) > +moment(input).startOf(units);
        },

        isBefore: function (input, units) {
            units = typeof units !== 'undefined' ? units : 'millisecond';
            return +this.clone().startOf(units) < +moment(input).startOf(units);
        },

        isSame: function (input, units) {
            units = typeof units !== 'undefined' ? units : 'millisecond';
            return +this.clone().startOf(units) === +moment(input).startOf(units);
        },

        min: function (other) {
            other = moment.apply(null, arguments);
            return other < this ? this : other;
        },

        max: function (other) {
            other = moment.apply(null, arguments);
            return other > this ? this : other;
        },

        zone : function (input) {
            var offset = this._offset || 0;
            if (input != null) {
                if (typeof input === "string") {
                    input = timezoneMinutesFromString(input);
                }
                if (Math.abs(input) < 16) {
                    input = input * 60;
                }
                this._offset = input;
                this._isUTC = true;
                if (offset !== input) {
                    addOrSubtractDurationFromMoment(this, moment.duration(offset - input, 'm'), 1, true);
                }
            } else {
                return this._isUTC ? offset : this._d.getTimezoneOffset();
            }
            return this;
        },

        zoneAbbr : function () {
            return this._isUTC ? "UTC" : "";
        },

        zoneName : function () {
            return this._isUTC ? "Coordinated Universal Time" : "";
        },

        daysInMonth : function () {
            return moment.utc([this.year(), this.month() + 1, 0]).date();
        },

        dayOfYear : function (input) {
            var dayOfYear = round((moment(this).startOf('day') - moment(this).startOf('year')) / 864e5) + 1;
            return input == null ? dayOfYear : this.add("d", (input - dayOfYear));
        },

        weekYear : function (input) {
            var year = weekOfYear(this, this.lang()._week.dow, this.lang()._week.doy).year;
            return input == null ? year : this.add("y", (input - year));
        },

        isoWeekYear : function (input) {
            var year = weekOfYear(this, 1, 4).year;
            return input == null ? year : this.add("y", (input - year));
        },

        week : function (input) {
            var week = this.lang().week(this);
            return input == null ? week : this.add("d", (input - week) * 7);
        },

        isoWeek : function (input) {
            var week = weekOfYear(this, 1, 4).week;
            return input == null ? week : this.add("d", (input - week) * 7);
        },

        weekday : function (input) {
            var weekday = (this._d.getDay() + 7 - this.lang()._week.dow) % 7;
            return input == null ? weekday : this.add("d", input - weekday);
        },

        isoWeekday : function (input) {
            // behaves the same as moment#day except
            // as a getter, returns 7 instead of 0 (1-7 range instead of 0-6)
            // as a setter, sunday should belong to the previous week.
            return input == null ? this.day() || 7 : this.day(this.day() % 7 ? input : input - 7);
        },

        // If passed a language key, it will set the language for this
        // instance.  Otherwise, it will return the language configuration
        // variables for this instance.
        lang : function (key) {
            if (key === undefined) {
                return this._lang;
            } else {
                this._lang = getLangDefinition(key);
                return this;
            }
        }
    };

    // helper for adding shortcuts
    function makeGetterAndSetter(name, key) {
        moment.fn[name] = moment.fn[name + 's'] = function (input) {
            var utc = this._isUTC ? 'UTC' : '';
            if (input != null) {
                this._d['set' + utc + key](input);
                moment.updateOffset(this);
                return this;
            } else {
                return this._d['get' + utc + key]();
            }
        };
    }

    // loop through and add shortcuts (Month, Date, Hours, Minutes, Seconds, Milliseconds)
    for (i = 0; i < proxyGettersAndSetters.length; i ++) {
        makeGetterAndSetter(proxyGettersAndSetters[i].toLowerCase().replace(/s$/, ''), proxyGettersAndSetters[i]);
    }

    // add shortcut for year (uses different syntax than the getter/setter 'year' == 'FullYear')
    makeGetterAndSetter('year', 'FullYear');

    // add plural methods
    moment.fn.days = moment.fn.day;
    moment.fn.months = moment.fn.month;
    moment.fn.weeks = moment.fn.week;
    moment.fn.isoWeeks = moment.fn.isoWeek;

    // add aliased format methods
    moment.fn.toJSON = moment.fn.toISOString;

    /************************************
        Duration Prototype
    ************************************/


    moment.duration.fn = Duration.prototype = {
        _bubble : function () {
            var milliseconds = this._milliseconds,
                days = this._days,
                months = this._months,
                data = this._data,
                seconds, minutes, hours, years;

            // The following code bubbles up values, see the tests for
            // examples of what that means.
            data.milliseconds = milliseconds % 1000;

            seconds = absRound(milliseconds / 1000);
            data.seconds = seconds % 60;

            minutes = absRound(seconds / 60);
            data.minutes = minutes % 60;

            hours = absRound(minutes / 60);
            data.hours = hours % 24;

            days += absRound(hours / 24);
            data.days = days % 30;

            months += absRound(days / 30);
            data.months = months % 12;

            years = absRound(months / 12);
            data.years = years;
        },

        weeks : function () {
            return absRound(this.days() / 7);
        },

        valueOf : function () {
            return this._milliseconds +
              this._days * 864e5 +
              (this._months % 12) * 2592e6 +
              ~~(this._months / 12) * 31536e6;
        },

        humanize : function (withSuffix) {
            var difference = +this,
                output = relativeTime(difference, !withSuffix, this.lang());

            if (withSuffix) {
                output = this.lang().pastFuture(difference, output);
            }

            return this.lang().postformat(output);
        },

        add : function (input, val) {
            // supports only 2.0-style add(1, 's') or add(moment)
            var dur = moment.duration(input, val);

            this._milliseconds += dur._milliseconds;
            this._days += dur._days;
            this._months += dur._months;

            this._bubble();

            return this;
        },

        subtract : function (input, val) {
            var dur = moment.duration(input, val);

            this._milliseconds -= dur._milliseconds;
            this._days -= dur._days;
            this._months -= dur._months;

            this._bubble();

            return this;
        },

        get : function (units) {
            units = normalizeUnits(units);
            return this[units.toLowerCase() + 's']();
        },

        as : function (units) {
            units = normalizeUnits(units);
            return this['as' + units.charAt(0).toUpperCase() + units.slice(1) + 's']();
        },

        lang : moment.fn.lang
    };

    function makeDurationGetter(name) {
        moment.duration.fn[name] = function () {
            return this._data[name];
        };
    }

    function makeDurationAsGetter(name, factor) {
        moment.duration.fn['as' + name] = function () {
            return +this / factor;
        };
    }

    for (i in unitMillisecondFactors) {
        if (unitMillisecondFactors.hasOwnProperty(i)) {
            makeDurationAsGetter(i, unitMillisecondFactors[i]);
            makeDurationGetter(i.toLowerCase());
        }
    }

    makeDurationAsGetter('Weeks', 6048e5);
    moment.duration.fn.asMonths = function () {
        return (+this - this.years() * 31536e6) / 2592e6 + this.years() * 12;
    };


    /************************************
        Default Lang
    ************************************/


    // Set default language, other languages will inherit from English.
    moment.lang('en', {
        ordinal : function (number) {
            var b = number % 10,
                output = (~~ (number % 100 / 10) === 1) ? 'th' :
                (b === 1) ? 'st' :
                (b === 2) ? 'nd' :
                (b === 3) ? 'rd' : 'th';
            return number + output;
        }
    });


    /************************************
        Exposing Moment
    ************************************/


    // CommonJS module is defined
    if (hasModule) {
        module.exports = moment;
    }
    /*global ender:false */
    if (typeof ender === 'undefined') {
        // here, `this` means `window` in the browser, or `global` on the server
        // add `moment` as a global object via a string identifier,
        // for Closure Compiler "advanced" mode
        this['moment'] = moment;
    }
    /*global define:false */
    if (typeof define === "function" && define.amd) {
        define("moment", [], function () {
            return moment;
        });
    }
    /************************************
        Exposing Moment
    ************************************/

    this['moment'] = moment;

}).call(typeof Kalendae === 'undefined' ? window : Kalendae);

if (!Kalendae.moment) {
	if (window.moment) {
		Kalendae.moment = window.moment;
	} else {
		throw "Kalendae requires moment.js. You must use kalendae.standalone.js if moment is not available on the page.";
	}
}

moment = Kalendae.moment;

//function to get the total number of days since the epoch.
moment.fn.yearDay = function (input) {
	var yearday = Math.floor(this._d / 86400000);
    return (typeof input === 'undefined') ? yearday :
        this.add({ d : input - yearday });
};

today = Kalendae.moment().startOf('day');

if (typeof jQuery !== 'undefined' && (typeof document.addEventListener === 'function' || util.isIE8())) {
	jQuery.fn.kalendae = function (options) {
		this.each(function (i, e) {
			if (e.tagName === 'INPUT') {
				//if element is an input, bind a popup calendar to the input.
				jQuery(e).data('kalendae', new Kalendae.Input(e, options));
			} else {
				//otherwise, insert a flat calendar into the element.
				jQuery(e).data('kalendae', new Kalendae(jQuery.extend({}, {attachTo:e}, options)));
			}
		});
		return this;
	};
}

    return Kalendae;
}));