<html> 
  <head> 
  <meta content="text/html; charset=utf-8" http-equiv="Content-Type" />
    <title>跳转页面</title>  
    <script src="jquery.js"></script>
    <script language="javascript"><!--
        $(document).ready(function() { 
            function jump(count) { 
                window.setTimeout(function(){ 
                    count--; 
                    if(count > 0) { 
                        $('#num').attr('innerHTML', count); 
                        jump(count); 
                    } else { 
                        location.href="http://jb200.com"; 
                    } 
                }, 1000); 
            } 
            jump(3); 
        });
// --></script> 
  </head>     
  <body>   
    <span style="color:red">欢迎来到jb200.com!</span><br/>jb200.com页面将在3秒后跳转...<br/>还剩<span id="num">3</span>秒
  </body> 
</html>
可以复制代码并保存到文件中,直接用浏览打开测试效果,注意引入jquery.js文件。
附,js几秒以后倒计时跳转代码
使用js实现几秒以后倒计时跳转。
 
<html> 
<head> 
<title>倒计时跳转代码--www.jb200.com</title> 
<link href="css/login1.css" mce_href="css/login1.css" rel="stylesheet" type="text/css" /> 
<script language="javascript" type="text/javascript"> 
var i = 5; 
var intervalid; 
intervalid = setInterval("fun()", 1000); 
function fun() { 
if (i == 0) { 
window.location.href = "../index.html"; 
clearInterval(intervalid); 
} 
document.getElementById("mes").innerHTML = i; 
i--; 
} 
</script> 
</head> 
<body> 
<div id="errorfrm"> 
<h3>出错啦~~~</h3> 
<div id="error"> 
<img src="images/error.gif" mce_src="images/error.gif" alt="" /> 
<p>系统出错,请联系管理员!</p> 
<p>将在 <span id="mes">5</span> 秒钟后返回首页!</p> 
</div>
</div> 
</body> 
</html>