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 + 35;
    } else {
      e.height = e.contentWindow.document.body.scrollHeight;
    }
  }

  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);	
  }