function lookupIp(ipAdr){

      if (window.XMLHttpRequest) { // Non-IE browsers
        req = new XMLHttpRequest();
        req.onreadystatechange = processAffichage;
        try {
          req.open("POST", '/lookupIpServlet', true);
          req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        } catch (e) {
          alert(e);
        }
        req.send("ipAdr="+ipAdr);
      } else if (window.ActiveXObject) { // IE
        req = new ActiveXObject("Microsoft.XMLHTTP");
        if (req) {
          req.onreadystatechange = processAffichage;
          req.open("POST", '/lookupIpServlet', true);
          req.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
          req.send("ipAdr="+ipAdr);
        }
      }
}

function processAffichage(){
if (req.readyState == 4) { // Complete

      if (req.status == 200) { // OK response
        
        ref = req.responseText;
        if(ref == "KO"){
        //si c'est KO, on se dirige vers la page de login hors europe
        document.location="/pages/login_hors_eu.jsp"; 
        }
        else{
        // si c'est ok, on fait rien, laisse afficher la page de login normale
        }
      } else {
        alert("Problem LookupIp JS: " + req.statusText);

      }

    }
}