function startTime()
{


var d=new Date();
var now=d.getTime();


days = Math.floor((event - now) / (24 * 60 * 60 * 1000));
if (days < 10) {days = "0"+days}

hours = Math.floor((event - now) / ( 60 * 60 * 1000)) % 24;
if (hours < 10) {hours = "0"+hours}

minutes = Math.floor((event - now) / ( 60 * 1000)) % 60;
if (minutes < 10) {minutes = "0"+minutes}

seconds = Math.floor((event - now) / ( 1000)) % 60;
if (seconds < 10) {seconds = "0"+seconds}

if (event < now)
{
document.getElementById('countdown').innerHTML="Time up!"
}
else
{
document.getElementById('countdown').innerHTML=days+" : "+hours+" : "+minutes+" : "+seconds+" "
}
setTimeout('startTime()',1000);
}

window.onload=startTime