function submitGuest() {
	if(!initAjax()) {
				alert('Votre navigateur ne supporte pas AJAX!');
				return false;
	}
	var strString = "";
	//strTitle = escape(document.getElementById("guestTitle").value);
	strMessage = escape(document.getElementById("guestMessage").value);
	strLastname  = escape(document.getElementById("guestLastname").value);
	strFirstname = escape(document.getElementById("guestFirstname").value);
	strEmail = escape(document.getElementById("guestEmail").value);
		xmlHttp.open("GET","save_guest.php?message="+strMessage+"&email="+strEmail+"&firstname="+strFirstname+"&lastname="+strLastname,true);
		xmlHttp.onreadystatechange = function() {
				if(xmlHttp.readyState == 4) {
						if(xmlHttp.status == 200) {
							strString = xmlHttp.responseText.toString();
						} else {
							strString = "Page: save_guest.php - " + xmlHttp.status + ": " + xmlHttp.statusText.toString();
						}
							
				} 
				document.getElementById("divGuest").innerHTML = strString;
		}
    xmlHttp.send(null);
}