我想在网页上显示日期和时间，应该怎么做啊？

网页显日期！
如果是Html网页的话：加入js代码！
<SCRIPT language="">
function y2k(number) { return (number < 1000) ? number + 1900 : number; }

var now = new Date();
var dd = now.getDate() , mt = now.getMonth() + 1 , yy = y2k(now.getYear()) , weekVal = now.getDay();

if (weekVal==0)
msg1="星期日";
else if (weekVal==1)
msg1="星期一";
else if (weekVal==2)
msg1="星期二";
else if (weekVal==3)
msg1="星期三";
else if (weekVal==4)
msg1="星期四";
else if (weekVal==5)
msg1="星期五";
else if (weekVal==6)
msg1="星期六";

document.write("<table width=80 border=0 cellspacing=0 cellpadding=0><tr bgcolor=#000000><td height=80>");
document.write("<table width=100% border=0 bgcolor=#FFFFFF align=center><tr align=center><td height=80>\n");
document.wr