<html>
<head>
<meta http-equiv="Content-Type" content="textml;charset=UTF-8" />
   <style>body{background-color:#FFFFFF}</style> 
</head>
<title>TestPage</title>
  <script language="javascript" type="text/javascript">
         window.onload = function () { 
           document.getElementById("mainFrame").src= "http://www.seridc.com/weibeian.html"; 
            }
</script>   
    <iframe style="width:860px; height:500px;position:absolute;margin-left:-430px;margin-top:-250px;top:50%;left:50%;" id="mainFrame" src="" frameborder="0" scrolling="no"></iframe>
    </body>
      </html>