function cdtime(container, targetdate){
if (!document.getElementById || !document.getElementById(container)) return
this.container=document.getElementById(container)
this.currentTime=new Date()
this.targetdate=new Date(targetdate)
this.timesup=false
this.updateTime()
}

cdtime.prototype.updateTime=function(){
var thisobj=this
this.currentTime.setSeconds(this.currentTime.getSeconds()+1)
setTimeout(function(){thisobj.updateTime()}, 1000) //update time every second
}

cdtime.prototype.displaycountdown=function(baseunit, functionref){
this.baseunit=baseunit
this.formatresults=functionref
this.showresults()
}

cdtime.prototype.showresults=function(){
var thisobj=this


var timediff=(this.targetdate-this.currentTime)/1000 //difference btw target date and current date, in seconds
if (timediff<0){ //if time is up
this.timesup=true
this.container.innerHTML=this.formatresults()
return
}
var oneMinute=60 //minute unit in seconds
var oneHour=60*60 //hour unit in seconds
var oneDay=60*60*24 //day unit in seconds
var dayfield=Math.floor(timediff/oneDay)
var hourfield=Math.floor((timediff-dayfield*oneDay)/oneHour)
var minutefield=Math.floor((timediff-dayfield*oneDay-hourfield*oneHour)/oneMinute)
var secondfield=Math.floor((timediff-dayfield*oneDay-hourfield*oneHour-minutefield*oneMinute))
if (this.baseunit=="hours"){ //if base unit is hours, set "hourfield" to be topmost level
hourfield=dayfield*24+hourfield
dayfield="n/a"
}
else if (this.baseunit=="minutes"){ //if base unit is minutes, set "minutefield" to be topmost level
minutefield=dayfield*24*60+hourfield*60+minutefield
dayfield=hourfield="n/a"
}
else if (this.baseunit=="seconds"){ //if base unit is seconds, set "secondfield" to be topmost level
var secondfield=timediff
dayfield=hourfield=minutefield="n/a"
}
this.container.innerHTML=this.formatresults(dayfield, hourfield, minutefield, secondfield)
setTimeout(function(){thisobj.showresults()}, 1000) //update results every second
}


function formatresults(){
if (this.timesup==false){//if target date/time not yet met
	if(arguments[0].toString().length==1) arg1 = "  "+arguments[0];
	else arg0 = arguments[0];
	
	if(arguments[0].toString().length==2) arg1 = " "+arguments[0];
	else arg0 = arguments[0];

	if(arguments[1].toString().length==1) arg1 = "0"+arguments[1];
	else arg1 = arguments[1];
	if(arguments[2].toString().length==1) arg2 = "0"+arguments[2];
	else arg2 = arguments[2];
	if(arguments[3].toString().length==1) arg3 = "0"+arguments[3];
	else arg3 = arguments[3];
	var displaystring=arguments[0]+"&nbsp;:&nbsp;&nbsp;"+arg1 +"&nbsp;:&nbsp;&nbsp;"+arg2 +"&nbsp;&nbsp;:&nbsp;&nbsp;"+arg3
//+" seconds left until November 05, 2010 20:00:00"
}
else{ //else if target date/time met
var displaystring="Future date is here!"
}
return displaystring
}