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

function setHeight(e){
if (e.Document && e.Document.body.scrollHeight) //ie5+ syntax
e.height = e.contentWindow.document.body.scrollHeight;

else if (e.contentDocument && e.contentDocument.body.scrollHeight) //ns6+ & opera syntax
e.height = e.contentDocument.body.scrollHeight;

else (e.contentDocument && e.contentDocument.body.offsetHeight) //standards compliant syntax – ie8
e.height = e.contentDocument.body.offsetHeight;
}