Problems with div and iframe display_html/css_WEB-ITnose

<div style="width:800px; height:600px;"><iframe style="display:none;" id="iframeInfo" name="iframeInfo" onload="javascript:{dyniframesize('iframeInfo');}" marginwidth="0" marginheight="0" height="100%" width="100%" scrolling="auto" frameborder="0" src="http://www.baidu.com"></iframe></div><script language="javascript">    var getFFVersion=navigator.userAgent.substring(navigator.userAgent.indexOf("Firefox")).split("/")[1];    //extra height in px to add to iframe in FireFox 1.0+ browsers    var FFextraHeight=getFFVersion>=0.1? 16 : 0 ;  function dyniframesize(iframename) {	   var pTar = null;	   if (document.getElementById){		   pTar = document.getElementById(iframename);	   }	   else{		   eval('pTar = ' + iframename + ';');	   }	   if (pTar && !window.opera){		   //begin resizing iframe		   pTar.style.display="block";			  		   if (pTar.contentDocument && pTar.contentDocument.body.offsetHeight){			   //ns6 syntax			   pTar.height = pTar.contentDocument.body.offsetHeight+FFextraHeight;		   }		   else if (pTar.Document && pTar.Document.body.scrollHeight){			   //ie5+ syntax			   pTar.height = pTar.Document.body.scrollHeight;		   }	   }   }</script>