function request(callback) {
if (xhr && xhr.readyState != 0) {
		xhr.abort(); // On annule la requête en cours !
	}

	var xhr = getXMLHttpRequest();
	
xhr.onreadystatechange = function() {
		if (xhr.readyState == 4 && (xhr.status == 200 || xhr.status == 0)) {
			callback(xhr.responseText);
			document.getElementById("loader").style.display = "none";
		} else if (xhr.readyState < 4) {
			document.getElementById("loader").style.display = "inline";
		}
	};


	var pseudo = encodeURIComponent(document.getElementById("pseudo").value);
	var email = encodeURIComponent(document.getElementById("email").value);
	var passwd = encodeURIComponent(document.getElementById("passwd").value);
	
	xhr.open("GET", "http://service2merde.fr/fonction/check_inscription.php?pseudo=" + pseudo + '&email='+ email + '&passwd='+ passwd, true);
	xhr.send(null);
}

function readData(sData) {
if (sData!=1){
	document.getElementById("erreur_ins").style.display = "inline";
	document.getElementById("erreur_ins").innerHTML = sData;
	}
}