方法1：

<script type="text/javascript">   
<!--   
function go(t,url){   
//t设置跳转时间：秒   
//url设置跳转网址  

    document.write("<div id=text>本页将在<strong id='tt'></strong>后，跳转至：<span id='link'></span></div>");   
    document.getElementById("link").innerHTML="<a href="+url+">"+url+"</a>";   
    $(t,url);   
}   
  
function $(t,url){   
ta = t-1;
tb = t + "000";   
d = document.getElementById("tt");   
d.innerHTML=t;   
  
window.setInterval(function()   
    {   
        go_to(url);   
    },1000);   
}
function go_to(url){   
d.innerHTML=ta--;   
if(ta<0){   
document.write("正在跳转至：<a href="+url+">"+url+"</a>");   
location.href=url;   
}   
else{   
return;   
}   
}   
//-->   
</script>  

    <script type="text/javascript">
    go(5, "/Login.aspx")   
</script> 

      window.setTimeout("window.location='index.shtml'",2000);

      //两秒后跳转新页面