<script type="text/javascript">               function delayURL(url) {            var delay = document.getElementById("cutdown").innerHTML; //取到id="cutdown"的对象，.innerHTML取到对象的值            if (delay > 0) {                delay--;                document.getElementById("cutdown").innerHTML = delay;            } else {                window.top.location.href = url; //跳转到URL            }            setTimeout("delayURL(‘" + url + "‘)", 1000);    //delayURL() 就是每间隔1000毫秒 调用delayURL(url);        }</script>

  <span>                <b id="cutdown">6</b>                秒自动跳转到<a href=http://www.mamicode.com/"http://passport.luyou666.com/Account/Logon">登录</a>页            </span>            <script type="text/javascript">                delayURL("http://passport.luyou666.com/Account/Logon"); //arti            </script>