拷贝下面的代码到你的html文件的和之间

<table border="1" width="85%">
<tbody>
<tr>
<td bgColor="#ffffff" width="100%"><font color="#ffffff"><script language="JavaScript"> <!---
today=new Date();
var hours = today.getHours();
var minutes = today.getMinutes();
var seconds = today.getSeconds();
var timeValue = "<FONT COLOR=black>" + ((hours >12) ? hours -12 :hours); timeValue += ((minutes < 10) ? "<BLINK><FONT COLOR=black>:</FONT></BLINK>0" : "<BLINK><FONT COLOR=black>:</FONT></BLINK>") + minutes+"</FONT></FONT>";
timeValue += (hours >= 12) ? "<FONT COLOR=blue><I><B>pm</B></I></FONT>" : "<FONT COLOR=blue><B><I>am</I></B></FONT>";
function initArray(){
this.length=initArray.arguments.length
for(var i=0;i<this.length;i++)
this[i+1]=initArray.arguments[i] }
var d=new initArray("<font color=RED>星期日","<font color=black>星期一","<font color=black>星期二","<font color=black>星期三","<font color=black>星期四","<font color=black>星期五","<font color=GREEN>星期六"); document.write("<font color=black>",today.getYear(),"<font color=red>年","<font color=black>",today.getMonth()+1,"<font color=red>月","<font color=black>",today.getDate(),"<font color=red>日 </FONT>",d[today.getDay()+1]," ",timeValue); //--></script>
</font></td>
</tr>
</tbody>
</table>