选项卡13

 <script language="javascript">
var limit="01:30"//刷新时限
var parselimit = limit.split(":")
parselimit = parselimit[0]*60 + parselimit[1]*1
function refresh(){
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+"秒后自动刷新本页，请抓紧时间提交问题！"
else
curtime=cursec+"秒后自动刷新本页，请抓紧时间提交问题！"
window.status=curtime
document.all.agree.value=""+curtime+""
setTimeout("refresh()",1000)
}
}
window.onload=refresh
</script>
<input id="agree" type=text>