Date.dayNames = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];

Date.abbrDayNames = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];

Date.monthNames = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];

Date.abbrMonthNames = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];

Date.firstDayOfWeek = 1;

Date.format = 'dd/mm/yyyy';


Date.fullYearStart = '20';

(function() {

function add(name, method) {	if( !Date.prototype[name] ) {		Date.prototype[name] = method;	}};
add("isLeapYear", function() {	var y = this.getFullYear();	return (y%4==0 && y%100!=0) || y%400==0;});add("isWeekend", function() {	return this.getDay()==0 || this.getDay()==6;});add("isWeekDay", function() {	return !this.isWeekend();});add("getDaysInMonth", function() {	return [31,(this.isLeapYear() ? 29:28),31,30,31,30,31,31,30,31,30,31][this.getMonth()];});add("getDayName", function(abbreviated) {	return abbreviated ? Date.abbrDayNames[this.getDay()] : Date.dayNames[this.getDay()];});

add("getMonthName", function(abbreviated) {	return abbreviated ? Date.abbrMonthNames[this.getMonth()] : Date.monthNames[this.getMonth()];});
add("getDayOfYear", function() {	var tmpdtm = new Date("1/1/" + this.getFullYear());	return Math.floor((this.getTime() - tmpdtm.getTime()) / 86400000);});add("getWeekOfYear", function() {	return Math.ceil(this.getDayOfYear() / 7);});
add("setDayOfYear", function(day) {	this.setMonth(0);	this.setDate(day);	return this;});add("addYears", function(num) {	this.setFullYear(this.getFullYear() + num);	return this;});add("addMonths", function(num) {	var tmpdtm = this.getDate();		this.setMonth(this.getMonth() + num);		if (tmpdtm > this.getDate())		this.addDays(-this.getDate());		return this;});add("addDays", function(num) {		this.setTime(this.getTime() + (num*86400000) );	return this;});add("addHours", function(num) {	this.setHours(this.getHours() + num);	return this;});
add("addMinutes", function(num) {	this.setMinutes(this.getMinutes() + num);	return this;});
add("addSeconds", function(num) {	this.setSeconds(this.getSeconds() + num);	return this;});add("zeroTime", function() {	this.setMilliseconds(0);	this.setSeconds(0);	this.setMinutes(0);	this.setHours(0);	return this;});add("asString", function(format) {	var r = format || Date.format;	return r		.split('yyyy').join(this.getFullYear())		.split('yy').join((this.getFullYear() + '').substring(2))		.split('mmmm').join(this.getMonthName(false))		.split('mmm').join(this.getMonthName(true))		.split('mm').join(_zeroPad(this.getMonth()+1))		.split('dd').join(_zeroPad(this.getDate()));});Date.fromString = function(s){	var f = Date.format;	var d = new Date('01/01/1977');		var mLength = 0;
	var iM = f.indexOf('mmmm');	if (iM > -1) {		for (var i=0; i<Date.monthNames.length; i++) {			var mStr = s.substr(iM, Date.monthNames[i].length);			if (Date.monthNames[i] == mStr) {				mLength = Date.monthNames[i].length - 4;				break;			}		}		d.setMonth(i);	} else {		iM = f.indexOf('mmm');		if (iM > -1) {			var mStr = s.substr(iM, 3);			for (var i=0; i<Date.abbrMonthNames.length; i++) {				if (Date.abbrMonthNames[i] == mStr) break;			}			d.setMonth(i);		} else {			d.setMonth(Number(s.substr(f.indexOf('mm'), 2)) - 1);		}	}		var iY = f.indexOf('yyyy');
	if (iY > -1) {		if (iM < iY)		{			iY += mLength;		}		d.setFullYear(Number(s.substr(iY, 4)));	} else {		if (iM < iY)		{			iY += mLength;		}		d.setFullYear(Number(Date.fullYearStart + s.substr(f.indexOf('yy'), 2)));	}	var iD = f.indexOf('dd');	if (iM < iD)	{		iD += mLength;	}	d.setDate(Number(s.substr(iD, 2)));	if (isNaN(d.getTime())) {		return false;	}	return d;};var _zeroPad = function(num) {	var s = '0'+num;	return s.substring(s.length-2)	};
})();