这个JavaScript代码是通用的，修改时间就可以用作其他倒计时了。
其中的背景图片请自行修改更换即可。
演示：
http://bbs.cnwyw.net 首页上部奥运倒计时红色小横幅。
复制内容到剪贴板
代码:
<div id="djs" style="background:url(imageslinshi/djs.gif) no-repeat;width:300px;height:24px;color:#ffd400;font-size:18px;font-family:Arial; text-align:right;padding-top: 2px;"> </div>
<script type="text/javascript">
<!--
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);
document.getElementById("djs").innerHTML = daysold+" "+hrsold+" "+minsold+" "+" ";
}
show_date_time();
//-->
</script>
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