简单倒计时代码

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<b><align=center><font color=#FF0000>春节倒计时</font></b><font color="#FF0000">

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<span id="span_dt_dt" style='align=center no:1px solid black;background-color:#FFFFFF' ></span>



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<SCRIPT language=javascript>

<!--

//document.write("");



function show_date_time(){

window.setTimeout("show_date_time()", 1000);

BirthDay=new Date("2-17-2007");//这个日期是可以修改的

today=new Date();

timeold=(BirthDay.getTime()-today.getTime());

sectimeold=timeold/1000

secondsold=Math.floor(sectimeold);

msPerDay=24*60*60*1000

e_daysold=timeold/msPerDay

daysold=Math.floor(e_daysold);

e_hrsold=(e_daysold-daysold)*24;

hrsold=Math.floor(e_hrsold);

e_minsold=(e_hrsold-hrsold)*60;

minsold=Math.floor((e_hrsold-hrsold)*60);

seconds=Math.floor((e_minsold-minsold)*60);

span_dt_dt.innerHTML="<b><align=center><font color=00CC00>"+daysold+"天"+hrsold+"小时"+minsold+"分"+seconds+"秒"+"</b><br></font>" ;



}



show_date_time();



//-->

</SCRIPT>