ASP.NET中配合JS实现页面计时（定时）自动跳转

%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
html xmlns="http://www.w3.org/1999/xhtml">
head runat="server">
  title>/title>
  
  script type="text/javascript">
    var i = 5;
    
    // 获取登录事件，并处理自动跳转
    window.onload = function JumpPage() 
    {
      document.getElementById("time").innerText = i;
      
      // 计时为0后，立即跳转
      i--;
      if (i  0) 
      {
        location.replace("http://www.baidu.com");
      }
      setTimeout("JumpPage()", 1000);
    }
  /script>
/head>
body>
  form id="form2" runat="server">
    div id="AutoJumpPage">
      欢迎您，本页将在span id="time" style="color: #FF0000">/span>秒后自动跳转至a href="http://www.baidu.com">百度/a>
      br />br />
      如需立即跳转，请直接点击 a href="http://www.baidu.com" style="color: #FF00FF">立即跳转>>/a>
    /div>
  /form>
/body>
/html>