jquery 倒计时代码分享一例

<span class="time_wrap" value="1397145180" style="line-height:200%;"></span>

<script type="text/javascript"> 
$(document).ready(function(){ 
setInterval(function(){ 
$(".time_wrap").each(function(){ 
var Obj = this; 
var EndTime = new Date(parseInt($(Obj).attr(‘value‘)) * 1000); 
var NowTime = new Date(); 
var nMS=EndTime.getTime() - NowTime.getTime(); 
var nD=Math.floor(nMS/(1000 * 60 * 60 * 24)); 
var nH=Math.floor(nMS/(1000*60*60)) % 24; 
var nM=Math.floor(nMS/(1000*60)) % 60; 
var nS=Math.floor(nMS/1000) % 60; 
var nMS=Math.floor(nMS/100) % 10; 
if(nD>= 0){ 
var str = ‘<span class="timer" ><em>‘+nD+‘</em>天<em>‘+nH+‘</em>小时<em>‘+nM+‘</em>分<em>‘+nS+‘.‘+nMS+‘</em>秒</span>‘; 
$(Obj).html(str); 
} 
}); 
}, 100);
}); 
</script>