如何用javascript脚本来实现定时重新加载页面的功能，谢谢，马上结贴！！！

<script>
var limit="0:10"
if (document.images){
var parselimit=limit.split(":")
parselimit=parselimit[0]*60+parselimit[1]*1}
function beginrefresh(){
if (!document.images)
return
if (parselimit==1)
window.location.reload()
else{ 
parselimit-=1
curmin=Math.floor(parselimit/60)
cursec=parselimit%60
if (curmin!=0)
curtime=curmin+"分"+cursec+"秒后重刷本页！"
else
curtime=cursec+"秒后重刷本页！"
window.status=curtime
setTimeout("beginrefresh()",1000)
}}
window.onload=beginrefresh
</script>