javaScript几秒钟后跳转

  <span id="time" style="background:red">5</span>秒后返回主题列表，若不返回请点击连接<a href="article.jsp">主题列表</a>
<script language="JavaScript1.2" type="text/javascript">
<!--
//  Place this in the 'head' section of your page. 

function delayURL(url) {
    var delay=document.getElementById("time").innerHTML;
    if(delay>0) {
      delay--;
      document.getElementById("time").innerHTML=delay;
    }else{
       window.top.location.href=url;
    }
      setTimeout("delayURL('"+url+"')",1000);
}

//-->

</script>