function verifConnexionB2B(){
	var login = document.getElementById("login_b2B").value;
	var mdp = document.getElementById("mdp_b2B").value;
	var instance = document.getElementById("instance").value;
	var formulaire = document.getElementById("formIdent");
	var msg = unescape(document.getElementById("msgErr").value);
	
	var req = "SELECT numero_groupe FROM "+instance+"_commun:mdp_clientp WHERE mdp='"+mdp+"' AND ";
	if(!isNaN(login)) req+="(numero_groupe='"+login+"' OR code_client='"+login+"')";
	else req+= "code_client='"+login+"'";
	
	var addr="/lib/ajax/traiteRequete.php";
	var sending = "requeteSQL="+escape(req);
	var xhr_local=creeObjHttpRequest();		
	
	xhr_local.onreadystatechange = function(){
		if( (xhr_local.readyState == 4) && xhr_local.status == 200){
			reponse = clean(xhr_local.responseXML.documentElement);
					
			var itms=reponse.getElementsByTagName("REPONSES");
			for (var i=0;i<itms[0].childNodes.length;i++){	
				if (itms[0].childNodes[i].childNodes[0]){					
			 		var numero_groupe=itms[0].childNodes[i].childNodes[0].firstChild.nodeValue;
				}
			}
			if(!numero_groupe || numero_groupe==0) alertAMalibu(msg);
			else formulaire.submit();
		}
	}
	xhr_local.open("POST",addr,true);
	xhr_local.setRequestHeader("Content-Type","application/x-www-form-urlencoded"); 
	xhr_local.send(sending);
}