5秒倒计时

  <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://passport.luyou666.com/Account/Logon">登录</a>页
            </span>
            <script type="text/javascript">
                delayURL("http://passport.luyou666.com/Account/Logon"); //arti
            </script>