JavaScript Countdown

<script type="text/javascript">

dateFuture1 = new Date(2012,11,25,0,0,0);

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 +" <span>"+((days==1)?"day":"days")+"</span>, "; }
                if(hours != 0) { out += hours +" <span>"+((hours==1)?"hour":"hours")+"</span>, "; }
                out += mins +" <span>"+((mins==1)?"minute":"minutes")+"</span>, ";
                out += secs +" <span>"+((secs==1)?"second":"seconds")+"</span>, ";
                out = out.substr(0,out.length-2);
                document.getElementById(iid).innerHTML=out;

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

window.onload=function(){
        GetCount(dateFuture1, 'countbox1');


};
</script>
<style type="text/css">
.countbox { /* style for overall box; since the style for the text is different (below), this is the style for the numbers */
font: 28px helvetica, arial, sans-serif;
color: #555;
}
.countbox span { /* style for actual text, e.g. minutes, seconds, hours, etc. */
font: 23px helvetica, arial, sans-serif;
vertical-align: middle;
}
</style>
<div id="countbox1" class="countbox"></div>