// Invio email
function invioemail(obj) {
	var xmlhttp = getXMLHttpRequest();
	var body = "nome="+obj.nome.value+"&email="+obj.email.value+"&commento="+obj.commento.value;
	var url = "php/invioemail.php";
	xmlhttp.open("POST", url, true);
	xmlhttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded; charset=UTF-8");
	xmlhttp.setRequestHeader("Content-length", body.length);
	xmlhttp.setRequestHeader("Connection", "close");
	xmlhttp.send(body);
	xmlhttp.onreadystatechange=function() {
		if(xmlhttp.readyState==4) {
			if(xmlhttp.status == 200) {
				if (xmlhttp.responseText == 0) {
					alert("Email inviata correttamente!");
					obj.submitbtn.disabled = true;
					obj.submitbtn.value = "Email inviata";
				} else {
					alert(xmlhttp.responseText);
				}
			}
		}
	}
}