//Creation de la requete
function Create_Request() {
	try {
		Request = new XMLHttpRequest();
	} catch (trymicrosoft) {
		try {
			Request = new ActiveXObject("Msxml2.XMLHTTP");
		} catch (othermicrosoft) {
			try {
				Request = new ActiveXObject("Microsoft.XMLHTTP");
			} catch (failed) {
				Request = null;
			}
		}
	}
	return Request;
};