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<script type="text/javascript">
//获取时间
window.onload=GetServerTime(15*60*1000);
function Timer(span)
{
var tmp = new Date();
var milsecs=Date.parse(tmp.getMonth()+"-"+tmp.getDay()+"-"+tmp.getFullYear()+" "+document.getElementById('lbl_Hour').innerText+":"+document.getElementById('lbl_Minute').innerText+":"+document.getElementById('lbl_Second').innerText);
var timer = new Date(milsecs+span);
var seconds,minutes,hours,date;
if(timer.getSeconds()<10)
seconds = "0"+timer.getSeconds();
else
seconds = timer.getSeconds();
if(timer.getMinutes()<10)
minutes = "0"+timer.getMinutes();
else
minutes = timer.getMinutes();
if(timer.getHours()<10)
hours = "0"+timer.getHours();
else
hours = timer.getHours();
date=timer.getDate();
document.getElementById('lbl_Second').innerText = seconds;
document.getElementById('lbl_Minute').innerText = minutes;
document.getElementById('lbl_Hour').innerText = hours;
}
//得到服务器时间每隔updatespan分钟校验一次,每秒更新一次本地时钟
function GetServerTime(updatespan)
{
var clientspan = 1*1000;
//更新本地时钟
setInterval("Timer("+clientspan+")",clientspan);
//同步服务器时钟
setInterval("window.location.href='JoinExamList.aspx'",updatespan);
}
</script>
var reurl = "";
var retime = 60;
var remethod = "_self";
function autoreturn(argurl,argtime,argmethod) {
var speed = 1000;
var argc = autoreturn.arguments.length;
reurl=argc>=1&&argurl!=""?argurl:reurl;
retime=argc>=2&&argtime>0?argtime:retime;
remethod=argc>=3&&argmethod!=""?argmethod:remethod;
autoreturnstr="\
系统将于\
<font color=red>\
<div id='timeflag' style='display:inline'>"+retime+" </div></font>\
秒之后 <a id=return href="+reurl+">返回</a>\
";
if(retime==0){
location.href=reurl;
clearTimeout(autotime);
return;
}
if(typeof(autolabel)=="undefined")document.write("<div id=autolabel></div>");
if(typeof(timeflag)=="undefined")document.getElementById("autolabel").innerHTML=autoreturnstr;
else document.getElementById("timeflag").innerHTML=retime+" ";
if (retime>0){
retime--;
//alert(eval("autoreturn()"))
autotime=window.setTimeout("autoreturn()", speed);
document.getElementById("return").focus();
}
}
<script language=javascript>
var creatIt = function (){
n= document.getElementById("number").value||3;
for(var i=0;i<n;i++){
var a = document.createElement('span');
a.innerHTML = '100';
a.id =i;
document.body.appendChild(a);
var b = document.createElement('input');
b.target = a;
b.type='button';
b.value='start';
b.onclick = start;
document.body.appendChild(b);
}
}
function start(o){
o=o||this.target
o.innerHTML -= 1;
if(o.innerHTML>0)setTimeout(function(){start.call(window,o);},1000);
}
</script>
<input id="number" type="text" value= 5></input>
<input type="button" value="creat" onclick="creatIt()"/>