2012世界末日倒计时代码 原来没事虚惊一场

<div id="container">离"世界末日"还有 <span id="downtime" style="color:red"></span></div>
<script>
function downTime(){
var timeout = window.setTimeout(downTime, 100);
var endTime=new Date("12-21-2012 0:0:0");//改成你的计时日期
var today=new Date();
var timeold=(endTime.getTime()-today.getTime());
if(timeold <= 100){
window.clearTimeout(timeout);
document.getElementByIdx_x("container").innerHTML = "原来没事啊，虚惊一场！";
return;
}
var sectimeold=timeold/1000;
var secondsold=Math.floor(sectimeold);
var msPerDay=24*60*60*1000;
var e_daysold=timeold/msPerDay;
var daysold=Math.floor(e_daysold);
var e_hrsold=(e_daysold-daysold)*24;
var hrsold=Math.floor(e_hrsold);
var e_minsold=(e_hrsold-hrsold)*60;
var minsold=Math.floor((e_hrsold-hrsold)*60);
var e_seconds=(e_minsold-minsold)*60;
var seconds=Math.floor((e_minsold-minsold)*60);
var decimals = Math.floor((e_seconds-seconds)*10);
document.getElementByIdx_x("downtime").innerHTML=daysold+"天"+hrsold+"小时"+minsold+"分"+seconds+"."+decimals+"秒" ;
}
downTime();
</script>