代码：
<b><font color="#000000">离2008北京奥运会开幕还有:</font><span id="span_dt_dt" style="align: center no:1px solid black"></span><SCRIPT language=javascript>
<!--
//document.write("");
function show_date_time(){
window.setTimeout("show_date_time()", 1000);
BirthDay=new Date("8/08/2008 20:00:00");//
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=ff0000>"+daysold+"天"+hrsold+"小时"+minsold+"分"+seconds+"秒"+"</b><br></font>" ;
}
show_date_time();
//-->
</SCRIPT>
