<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="Snova" />
<title>倒數計時</title>
<script type="text/javascript">
window.onload=function(){
var timer=null;
var show=document.getElementById("show");
function show_date_time(){
var target=new Date("9999/12/31");
var today=new Date();
var timeold=(target.getTime()-today.getTime());
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 seconds=Math.floor((e_minsold-minsold)*60);
if(daysold<0){
document.getElementById("time").innerHTML="逾期,倒數計時已經失效";
clearInterval(timer);
}
else{
if (daysold<10) {daysold="0"+daysold}
if (hrsold<10) {hrsold="0"+hrsold}
if (minsold<10) {minsold="0"+minsold}
if (seconds<10) {seconds="0"+seconds}
show.innerHTML="距離9999/12/31還有:"+daysold+"天"+hrsold+"小時"+minsold+"分"+seconds+"秒";
}
}
timer=setInterval(show_date_time,1000);
}
</script>
</head>
<body>
<div id="show"></div>
</body>
</html>
