<iframe  
id="contentFrame"  
name="contentFrame"  
src=""  
frameborder="0"  
scrolling="no"  
width="100%"  
height="100%"  
οnlοad="Javascript:SetWinHeight(this)"> 
</iframe> 
function SetWinHeight(obj)  
{ 
  var doc; 
  if(obj.contentDocument) 
  { 
   doc = obj.contentDocument.body; 
  }else if(obj.Document) 
  { 
   doc = obj.Document.body; 
  }  
  /*var s = ""; 
  for(var p in doc) 
  {   
   if(p.indexOf("Height")>0) 
   { 
    s += p +"=" + doc[p] + "\n"; 
   } 
  } 
  alert(s);*/ 
  var h =  Math.max(doc.scrollHeight,doc.offsetHeight,doc.clientHeight );  
   obj.style.height =  h+ "px"; 
}