怎样使网页的日期自动更新啊，各位美女帅哥高手专家帮下忙啦，在线等。

<script language="JavaScript">
var dayarray=new Array("星期日","星期一","星期二","星期三","星期四","星期五","星期六")
var montharray=new Array("01","02","03","04","05","06","07","08","09","10","11","12")
function getthedate(){
var mydate=new Date()
var year=mydate.getYear()
if (year < 1000)
year+=1900
var day=mydate.getDay()
var month=mydate.getMonth()
var daym=mydate.getDate()
if (daym<10)
daym="0"+daym
var hours=mydate.getHours()
var minutes=mydate.getMinutes()
var seconds=mydate.getSeconds()
//var dn="上午"
//if (hours>=12)
//dn="下午"
//if (hours>12){
//hours=hours-12
//}
//if (hours==0)
//hours=12
var dn=""
if (minutes<=9)<