Date.prototype.format=function(format){var returnStr='';var replace=Date.replaceChars;for(var i=0;i<format.length;i++){var curChar=format.charAt(i);if(i-1>=0&&format.charAt(i-1)=="\\"){returnStr+=curChar;}else if(replace[curChar]){returnStr+=replace[curChar].call(this);}else if(curChar!="\\"){returnStr+=curChar;}}return returnStr;};Date.replaceChars={shortMonths:['Jan','Feb','Mar','Apr','May','Jun','Jul','Aug','Sep','Oct','Nov','Dec'],longMonths:['January','February','March','April','May','June','July','August','September','October','November','December'],shortDays:['Sun','Mon','Tue','Wed','Thu','Fri','Sat'],longDays:['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'],d:function(){return(this.getDate()<10?'0':'')+this.getDate();},D:function(){return Date.replaceChars.shortDays[this.getDay()];},j:function(){return this.getDate();},l:function(){return Date.replaceChars.longDays[this.getDay()];},N:function(){return this.getDay()+1;},S:function(){return(this.getDate()%10==1&&this.getDate()!=11?'st':(this.getDate()%10==2&&this.getDate()!=12?'nd':(this.getDate()%10==3&&this.getDate()!=13?'rd':'th')));},w:function(){return this.getDay();},z:function(){var d=new Date(this.getFullYear(),0,1);return Math.ceil((this-d)/86400000);},W:function(){var d=new Date(this.getFullYear(),0,1);return Math.ceil((((this-d)/86400000)+d.getDay()+1)/7);},F:function(){return Date.replaceChars.longMonths[this.getMonth()];},m:function(){return(this.getMonth()<9?'0':'')+(this.getMonth()+1);},M:function(){return Date.replaceChars.shortMonths[this.getMonth()];},n:function(){return this.getMonth()+1;},t:function(){var d=new Date();return new Date(d.getFullYear(),d.getMonth(),0).getDate()},L:function(){var year=this.getFullYear();return(year%400==0||(year%100!=0&&year%4==0));},o:function(){var d=new Date(this.valueOf());d.setDate(d.getDate()-((this.getDay()+6)%7)+3);return d.getFullYear();},Y:function(){return this.getFullYear();},y:function(){return(''+this.getFullYear()).substr(2);},a:function(){return this.getHours()<12?'am':'pm';},A:function(){return this.getHours()<12?'AM':'PM';},B:function(){return Math.floor((((this.getUTCHours()+1)%24)+this.getUTCMinutes()/60+this.getUTCSeconds()/3600)*1000/24);},g:function(){return this.getHours()%12||12;},G:function(){return this.getHours();},h:function(){return((this.getHours()%12||12)<10?'0':'')+(this.getHours()%12||12);},H:function(){return(this.getHours()<10?'0':'')+this.getHours();},i:function(){return(this.getMinutes()<10?'0':'')+this.getMinutes();},s:function(){return(this.getSeconds()<10?'0':'')+this.getSeconds();},u:function(){var m=this.getMilliseconds();return(m<10?'00':(m<100?'0':''))+m;},e:function(){return"Not Yet Supported";},I:function(){return"Not Yet Supported";},O:function(){return(-this.getTimezoneOffset()<0?'-':'+')+(Math.abs(this.getTimezoneOffset()/60)<10?'0':'')+(Math.abs(this.getTimezoneOffset()/60))+'00';},P:function(){return(-this.getTimezoneOffset()<0?'-':'+')+(Math.abs(this.getTimezoneOffset()/60)<10?'0':'')+(Math.abs(this.getTimezoneOffset()/60))+':00';},T:function(){var m=this.getMonth();this.setMonth(0);var result=this.toTimeString().replace(/^.+ \(?([^\)]+)\)?$/,'$1');this.setMonth(m);return result;},Z:function(){return-this.getTimezoneOffset()*60;},c:function(){return this.format("Y-m-d\\TH:i:sP");},r:function(){return this.toString();},U:function(){return this.getTime()/1000;}};
var Timer = function(dStart, oContainer, dMaxMinutes, autostart)
{
    if(typeof dStart == 'string') {
        this.dStart = new Date(dStart);
    }
    else {
        this.dStart = dStart || new Date();
    }
    if(typeof oContainer == 'string') {
        this.oContainer = document.getElementById(oContainer);
    }
    else {
        this.oContainer = oContainer || null;
    }
    this.dMaxMinutes = dMaxMinutes || 30;
    this.aEvents = new Array();
    if(typeof autostart != 'undefined' && autostart) {
        this.start();
    }
};
Timer.prototype.setContainer = function(oContainer)
{
        this.oContainer = oContainer;
        return this;
};
Timer.prototype.start = function()
{
    this.printTime();
};
Timer.prototype.printTime = function()
{
    var diffDate = new Date(new Date() - this.dStart);
    var dMinute = diffDate.format('i');
    var dSecond = diffDate.format('s');
    
    
    if(diffDate.format('i') < this.dMaxMinutes) {
        this.oContainer.innerHTML = diffDate.format('i:s');
    }
    else {
        this.oContainer.innerHTML = '--:--';
    }
    for(key in this.aEvents) {
        if(this.aEvents[key].dMinutes == dMinute && this.aEvents[key].dSeconds == dSecond) {
            this.aEvents[key].fCallback();
        }
    }
};
Timer.prototype.setEventTime = function(dMinutes, dSeconds, fCallback)
{
    this.aEvents.push({ dMinutes: dMinutes, dSeconds: dSeconds, fCallback: fCallback});
};