網頁設計如何做倒計時牌

<SCRIPT language=javascript><!--

BirthDay=new Date("january 01,2000");//改成計時日期

today=new Date();

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

//-->

</SCRIPT><SCRIPT language=javascript><!--

document.write("新世紀已經進去了"+daysold+"天"+hrsold+"小時"+minsold+"分"+seconds+"秒了!");

//-->

</SCRIPT>