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.setDate(this.getDate() + num); 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() { var r = Date.format; return r
.split('yyyy').join(this.getFullYear())
.split('yy').join((this.getFullYear() + '').substring(2))
.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 iY = f.indexOf('yyyy'); if (iY > -1) { d.setFullYear(Number(s.substr(iY, 4)));} else { d.setFullYear(Number(Date.fullYearStart + s.substr(f.indexOf('yy'), 2)));}
var 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);}
d.setDate(Number(s.substr(f.indexOf('dd'), 2))); if (isNaN(d.getTime())) { return false;}
return d;}; var _zeroPad = function(num) { var s = '0'+num; return s.substring(s.length-2)
};})();