Compteur de temps restant Javascript

<script type="text/javascript">
// NOTE: the month entered must be one less than current month. ie; 0=January, 11=December

dateFuture1 = new Date(<? echo $year; ?>,<? echo $month; ?>,<? echo $day; ?>,<? echo $hour; ?>,<? echo $min; ?>,<? echo $sec; ?>);

//###################################
//nothing beyond this point
function GetCount(ddate,iid){

	dateNow = new Date();	//grab current date
	amount = ddate.getTime() - dateNow.getTime();	//calc milliseconds between dates
	delete dateNow;

	// if time is already past
	if(amount < 0){
		document.getElementById(iid).innerHTML="Now!";
	}
	// else date is still good
	else{
		days=0;hours=0;mins=0;secs=0;out="";

		amount = Math.floor(amount/1000);//kill the "milliseconds" so just secs

		days=Math.floor(amount/86400);//days
		amount=amount%86400;

		hours=Math.floor(amount/3600);//hours
		amount=amount%3600;

		mins=Math.floor(amount/60);//minutes
		amount=amount%60;

		secs=Math.floor(amount);//seconds

		if(days != 0){out += days +" "+((days==1)?"Day":"Days")+", ";}
		if(hours != 0){out += hours +" "+((hours==1)?"Hour":"Hours")+", ";}
		out += mins +" "+((mins==1)?"M":"M")+", ";
		out += secs +" "+((secs==1)?"S":"S")+", ";
		out = out.substr(0,out.length-2);
		document.getElementById(iid).innerHTML=out;

		setTimeout(function(){GetCount(ddate,iid)}, 1000);
	}
}

window.onload=function(){
	GetCount(dateFuture1, 'countbox1');
	//you can add additional countdowns here (just make sure you create dateFuture2 and countbox2 etc for each)
};
</script>
<div id="countbox1"></div>