function ajax(url){
req = null;
if (window.XMLHttpRequest) {
req = new XMLHttpRequest();
req.onreadystatechange = processReqChange;
req.open("GET",url,true);
req.send(null);
}
else if (window.ActiveXObject) {
	req = new ActiveXObject("Microsoft.XMLHTTP");
	if (req) {req.onreadystatechange = processReqChange;
	req.open("GET",url,true);
	req.send();
	}
	}
	}
	function processReqChange(){
		if (req.readyState == 1) {
			document.getElementById('lista_video_ajax').innerHTML = "Carregando, por favor aguarde...";
			}
		else if (req.readyState == 4) {
			if (req.status ==200) {
				document.getElementById('lista_video_ajax').innerHTML = req.responseText;
			} else {
				alert("Houve um problema ao obter os dados:n" + req.statusText);
			}
			}
			}