/*
 * Date Format 1.2.2
 * (c) 2007-2008 Steven Levithan <stevenlevithan.com>
 * MIT license
 * Includes enhancements by Scott Trenda <scott.trenda.net> and Kris Kowal <cixar.com/~kris.kowal/>
 *
 * Accepts a date, a mask, or a date and a mask.
 * Returns a formatted version of the given date.
 * The date defaults to the current date/time.
 * The mask defaults to dateFormat.masks.default.
 */
var dateFormat = function () {
	var	token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZ]|"[^"]*"|'[^']*'/g,
		timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,
		timezoneClip = /[^-+\dA-Z]/g,
		pad = function (val, len) {
			val = String(val);
			len = len || 2;
			while (val.length < len) val = "0" + val;
			return val;
		};

	// Regexes and supporting functions are cached through closure
	return function (date, mask, utc) {
		var dF = dateFormat;

		// You can't provide utc if you skip other args (use the "UTC:" mask prefix)
		if (arguments.length == 1 && (typeof date == "string" || date instanceof String) && !/\d/.test(date)) {
			mask = date;
			date = undefined;
		}

		// Passing date through Date applies Date.parse, if necessary
		date = date ? new Date(date) : new Date();
		if (isNaN(date)) throw new SyntaxError("invalid date");

		mask = String(dF.masks[mask] || mask || dF.masks["default"]);

		// Allow setting the utc argument via the mask
		if (mask.slice(0, 4) == "UTC:") {
			mask = mask.slice(4);
			utc = true;
		}

		var	_ = utc ? "getUTC" : "get",
			d = date[_ + "Date"](),
			D = date[_ + "Day"](),
			m = date[_ + "Month"](),
			y = date[_ + "FullYear"](),
			H = date[_ + "Hours"](),
			M = date[_ + "Minutes"](),
			s = date[_ + "Seconds"](),
			L = date[_ + "Milliseconds"](),
			o = utc ? 0 : date.getTimezoneOffset(),
			flags = {
				d:    d,
				dd:   pad(d),
				ddd:  dF.i18n.dayNames[D],
				dddd: dF.i18n.dayNames[D + 7],
				m:    m + 1,
				mm:   pad(m + 1),
				mmm:  dF.i18n.monthNames[m],
				mmmm: dF.i18n.monthNames[m + 12],
				yy:   String(y).slice(2),
				yyyy: y,
				h:    H % 12 || 12,
				hh:   pad(H % 12 || 12),
				H:    H,
				HH:   pad(H),
				M:    M,
				MM:   pad(M),
				s:    s,
				ss:   pad(s),
				l:    pad(L, 3),
				L:    pad(L > 99 ? Math.round(L / 10) : L),
				t:    H < 12 ? "a"  : "p",
				tt:   H < 12 ? "am" : "pm",
				T:    H < 12 ? "A"  : "P",
				TT:   H < 12 ? "AM" : "PM",
				Z:    utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""),
				o:    (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),
				S:    ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10]
			};

		return mask.replace(token, function ($0) {
			return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1);
		});
	};
}();

// Some common format strings
dateFormat.masks = {
	"default":      "ddd mmm dd yyyy HH:MM:ss",
	shortDate:      "m/d/yy",
	mediumDate:     "mmm d, yyyy",
	longDate:       "mmmm d, yyyy",
	fullDate:       "dddd, mmmm d, yyyy",
	shortTime:      "h:MM TT",
	mediumTime:     "h:MM:ss TT",
	longTime:       "h:MM:ss TT Z",
	isoDate:        "yyyy-mm-dd",
	isoTime:        "HH:MM:ss",
	isoDateTime:    "yyyy-mm-dd'T'HH:MM:ss",
	isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'"
};

// Internationalization strings
dateFormat.i18n = {
	dayNames: [
		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
		"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
	],
	monthNames: [
		"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
		"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"
	]
};

// For convenience...
Date.prototype.format = function (mask, utc) {
	return dateFormat(this, mask, utc);
};
/*
	Mask 								Description
	d									Day of the month as digits; no leading zero for single-digit days.
	dd									Day of the month as digits; leading zero for single-digit days.
	ddd									Day of the week as a three-letter abbreviation.
	dddd								Day of the week as its full name.
	m									Month as digits; no leading zero for single-digit months.
	mm									Month as digits; leading zero for single-digit months.
	mmm									Month as a three-letter abbreviation.
	mmmm								Month as its full name.
	yy									Year as last two digits; leading zero for years less than 10.
	yyyy								Year represented by four digits.
	h									Hours; no leading zero for single-digit hours (12-hour clock).
	hh									Hours; leading zero for single-digit hours (12-hour clock).
	H									Hours; no leading zero for single-digit hours (24-hour clock).
	HH									Hours; leading zero for single-digit hours (24-hour clock).
	M									Minutes; no leading zero for single-digit minutes.
	MM									Minutes; leading zero for single-digit minutes.
	s									Seconds; no leading zero for single-digit seconds.
	ss									Seconds; leading zero for single-digit seconds.
	l or L								Milliseconds. l gives 3 digits. L gives 2 digits.
	t									Lowercase, single-character time marker string: a or p.
	tt									Lowercase, two-character time marker string: am or pm.
	T									Uppercase, single-character time marker string: A or P.
	TT									Uppercase, two-character time marker string: AM or PM.
	Z									US timezone abbreviation, e.g. EST or MDT. With non-US timezones or in the Opera browser, the GMT/UTC offset is returned, e.g. GMT-0500
	o									GMT/UTC timezone offset, e.g. -0500 or +0230.
	S									The date's ordinal suffix (st, nd, rd, or th). Works well with d.
	'…' or "…"							Literal character sequence. Surrounding quotes are removed.
	UTC:								Must be the first four characters of the mask. Converts the date from local time to UTC/GMT/Zulu time before applying the mask. The "UTC:" prefix is removed.


And here are the named masks provided by default (you can easily change these or add your own):

Name										Mask										Example
default										ddd mmm dd yyyy HH:MM:ss					Sat Jun 09 2007 17:46:21
shortDate									m/d/yy										6/9/07
mediumDate									mmm d, yyyy									Jun 9, 2007
longDate									mmmm d, yyyy								June 9, 2007
fullDate									dddd, mmmm d, yyyy							Saturday, June 9, 2007
shortTime									h:MM TT										5:46 PM
mediumTime									h:MM:ss TT									5:46:21 PM
longTime									h:MM:ss TT Z								5:46:21 PM EST
isoDate										yyyy-mm-dd									2007-06-09
isoTime										HH:MM:ss									17:46:21
isoDateTime									yyyy-mm-dd'T'HH:MM:ss						2007-06-09T17:46:21
isoUtcDateTime								UTC:yyyy-mm-dd'T'HH:MM:ss'Z'				2007-06-09T22:46:21Z
*/