js做页面载入中，请稍后

<script   language=javascript>
<!--  
      document.write('<div id=loadDiv style="padding-top:20; text-align:center">'+'页面正在载入，请稍后<span id="loading"></span></div>');  
      var   setInterval1= setInterval("loading.innerText +='.'",300);  
      var   setInterval2 = setInterval("loading.innerText = ''",15000);  
      function   window.onload()  
      {  
            hiddenDiv.style.display="";   
            loadDiv.removeNode(true);  
            clearInterval(setInterval1);  
            clearInterval(setInterval2);  
      }  
      //   -->
</script>  
<div id=hiddenDiv style="display:none">  
这里载入
</div>

 列子：

<script   language=javascript>
<!--  
      document.write('<div id=loadDiv style="padding-top:20; text-align:center">'+'页面正在载入，请稍后<span id="loading"></span></div>');  
      var   setInterval1= setInterval("loading.innerText +='.'",300);  
      var   setInterval2 = setInterval("loading.innerText = ''",15000);  
      function   window.onload()  
      {  
            hiddenDiv.style.display="";   
            loadDiv.removeNode(true);  
            clearInterval(setInterval1);  
            clearInterval(setInterval2);  
      }  
      //   -->
</script>  
<div id=hiddenDiv style="display:none">  
<iframe src="pwpfhzs2.asp?bi_id=<%=bi_id%>" width="100%" height="100%" scrolling="auto" id="planresult" name="planresult">您的浏览器不支持框架！</iframe>
</div>