404页面停留指定秒数后跳转到网站首页

使用腾讯提供的404页面停留指定秒数后跳转到网站首页

HTML代码部分：

    <div>
        <span class="times"><span id="time">7</span> 秒后</span>
        <script src="http://www.qq.com/404/search_children.js" type="text/javascript" charset="utf-8"></script>
    </div>

<div>

</div>

Javascript代码部分：

    <script language="javascript">
       //涛哥笔记　blog.kydbk.com
       var oTime=document.getElementById('time');
       var oSecs=7;
       function time()
          {
            oSecs --;
             if (oSecs < 0)
             {
                clearInterval();
                return;
             }
             if (oSecs == 0)
             {
                clearInterval();
                window.location.href = 'http://blog.kydbk.com';
             }
             oTime.innerHTML = oSecs;
          }
       setInterval(time,1000)
    </script>