function doIframe(){
    o = document.getElementsByTagName('iframe');
    for(i=0;i<o.length;i++){
	   if (/\bautoHeight\b/.test(o[i].className)){
		  setHeight(o[i]);
		  addEvent(o[i],'load', doIframe);
		}
	  }
	}

   function setHeight(e){
	  if(e.contentDocument){
	    e.height = e.contentDocument.body.offsetHeight + 40;
	  } else {
	    e.height = e.contentWindow.document.body.scrollHeight + 5;
	  }
	}

  function addEvent(obj, evType, fn){
   
    if(obj.addEventListener)
	 {
	   obj.addEventListener(evType, fn,false);
	   return true;
	 } else if (obj.attachEvent){
	   var r = obj.attachEvent("on"+evType, fn);
	   return r;
	 } else {
	   return false;
	 }
  }

  if (document.getElementById && document.createTextNode){
    addEvent(window,'load', doIframe);	
  }