function alturaAutomaticaIframe(obj) {
	var apply = function(alt) { document.getElementById(obj).style.height = alt + "px"; }
	var altNIE = function() { apply(document.getElementById(obj).contentWindow.document.body.parentNode.offsetHeight); }
	var altFIE = function() { apply(document.getElementById(obj).contentWindow.document.body.scrollHeight); }
	navigator.appName.indexOf("Internet Explorer") > -1 ? setTimeout(altFIE, 100) : altNIE();
}