javascript倒计时功能：

离活动截止时间还有<span id="_lefttime" style="color:red;"></span>

<SCRIPT LANGUAGE="JavaScript">

function _fresh()

{

 var endtime=new Date("May 8, 2010 17:00:00");

 var nowtime = new Date();

 var leftsecond=parseInt((endtime.getTime()-nowtime.getTime())/1000);

 if(leftsecond<0){leftsecond=0;}

 __d=parseInt(leftsecond/3600/24);

 __h=parseInt((leftsecond/3600)%24);

 __m=parseInt((leftsecond/60)%60);

 __s=parseInt(leftsecond%60);

 __all = __d+"天 "+__h+"小时"+__m+"分"+__s+"秒";

 document.getElementById("_lefttime").innerHTML=__d+"天 "+__h+"小时"+__m+"分"+__s+"秒";

}

_fresh()

setInterval(_fresh,1000);

</SCRIPT>