/*
 * Date prototype extensions. Doesn't depend on any
 * other code. Doens't overwrite existing methods.
 *
 * Adds dayNames, abbrDayNames, monthNames and abbrMonthNames static properties and isLeapYear,
 * isWeekend, isWeekDay, getDaysInMonth, getDayName, getMonthName, getDayOfYear, getWeekOfYear,
 * setDayOfYear, addYears, addMonths, addDays, addHours, addMinutes, addSeconds methods
 *
 * Copyright (c) 2006 JÃ¶rn Zaefferer and Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
 *
 * Additional methods and properties added by Kelvin Luck: firstDayOfWeek, dateFormat, zeroTime, asString, fromString -
 * I've added my name to these methods so you know who to blame if they are broken!
 * 
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 *
 */

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);};})();