JS to achieve the Countdown page automatically jump (such as the 404 page used frequently)

In the Web front-end design, we often encounter the need to implement the page countdown jump, for example, in the 404 page will often use this feature, then how to implement it, in fact, the implementation of the method is very simple, the implementation code is as follows:
<TITLE>JS Countdown page Auto Jump code </title>   <script language= "JavaScript" type= "Text/javascript" >    function Delayurl (URL) {        var delay = document.getElementById ("Time"). InnerHTML;        if (Delay > 0) {            delay--;            document.getElementById ("Time"). InnerHTML = delay;        } else {            window.top.location.href = URL;        }       t = setTimeout ("Delayurl ('")

+ URL + "')", +);    } function Stop1 () {   T && cleartimeout (t);} </script><span id= "Time" style= "background: #00BFFF" >1000</span> seconds after the automatic jump, if not jump, please click the link below <a href = "Http://www.codes51.com" > I want the source network </a><input type= "button" value= "Stop Jump" onclick= "stop1 ();" ><script type= "Text/javascript" >delayurl ("http://www.codes51.com"); </script>

JS to achieve the Countdown page automatically jump (such as the 404 page used frequently)