一个不错的html">js html页面倒计时可精确到秒,很简单,但和实用
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<!doctype html>
<html>
<head>
<meta charset= "utf-8" >
</head>
<body>
<DIV id= "CountMsg" class= "HotDate" >
<span id= "t_d" >00天</span>
<span id= "t_h" >00时</span>
<span id= "t_m" >00分</span>
<span id= "t_s" >00秒</span>
</DIV>
<script type= "text/javascript" >
function getRTime(){
var EndTime= new Date( '2014/10/23 10:00:00' ); //截止时间
var NowTime = new Date();
var t =EndTime.getTime() - NowTime.getTime();
/*var d=Math.floor(t/1000/60/60/24);
t-=d*(1000*60*60*24);
var h=Math.floor(t/1000/60/60);
t-=h*60*60*1000;
var m=Math.floor(t/1000/60);
t-=m*60*1000;
var s=Math.floor(t/1000);*/
var d=Math.floor(t/1000/60/60/24);
var h=Math.floor(t/1000/60/60%24);
var m=Math.floor(t/1000/60%60);
var s=Math.floor(t/1000%60);
document.getElementById( "t_d" ).innerHTML = d + "天" ;
document.getElementById( "t_h" ).innerHTML = h + "时" ;
document.getElementById( "t_m" ).innerHTML = m + "分" ;
document.getElementById( "t_s" ).innerHTML = s + "秒" ;
}
setInterval(getRTime,1000);
</script>
</body>
</html>
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