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;
	} 
	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);	
}