会做asp.net 时间倒记时的来，谢谢了。
我想实现一个时间倒记时。
在网上找了一个是可以倒记时了，可是我挂在IIS上，每台电脑都是最初的时间，开始算的，能不能实现时间同步。
下面是网上找的。。
<script language="JavaScript">
var maxtime;
if (window.name == '') {
var minuts = parseInt(document.getElementById('ctl00_ContentPlaceHolder1_lblMinutes').innerHTML);
maxtime = minuts * 60;
} else {
maxtime = window.name;
}
function CountDown() {
if (maxtime >= 0) {
minutes = Math.floor(maxtime / 60);
seconds = Math.floor(maxtime % 60);
document.all["ctl00_ContentPlaceHolder1_lblMinutes"].innerHTML = minutes;
document.all["lblSeconds"].innerHTML = seconds;
if (maxtime == 5 * 60) alert('注意，还有5分钟!');
--maxtime;
window.name = maxtime;
}
else {
//alert("抢购时间到，结束!");
}
}
setInterval("CountDown()", 1000);
//-->
</script>
[解决办法]
你可以这样，需要把截止时间记录在服务器上
<%@ Page Language="C#" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server"> public DateTime DeadTime = DateTime.Parse("2011-8-15 16:0:0"); public int left = 0; protected void Page_Load(object sender, EventArgs e) { TimeSpan t = DeadTime.Subtract(DateTime.Now); left = Convert.ToInt32(t.TotalMinutes); }</script><html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title></title></head><body> <form id="form1" runat="server"> <div id="MCount"></div><div id="SCount"></div> <script language="JavaScript">var maxtime;var minuts = <%=left %>;maxtime = minuts * 60;function CountDown() {if (maxtime >= 0) {minutes = Math.floor(maxtime / 60);seconds = Math.floor(maxtime % 60);document.getElementById("MCount").innerHTML = minutes;document.getElementById("SCount").innerHTML = seconds;if (maxtime == 5 * 60) alert('注意，还有5分钟!');--maxtime;}else {//alert("抢购时间到，结束!");}}setInterval("CountDown()", 1000);//--></script </form></body></html>