javascript 实现自动跳转功能

1

    <script language='javascript' type='text/javascript'>
     var secs =5; //倒计时的秒数
     var URL ;
     function Load(url){
        URL =url;
        for(var i=secs;i>=0;i--)
       {
         window.setTimeout('doUpdate(' + i + ')', (secs-i) * 1000);
       
       }
    }
   
    function doUpdate(num)
    {
     document.getElementById('ShowDiv').innerHTML = '将在'+num+'秒后自动跳转到 Google' ;
     if(num == 0) { window.location=URL;  }
    }
  </script>

2.

<meta http-equiv ="refresh" content ="3; url='/test1/loginerr.htm'" >