diff --git a/bureau/class/m_admin.php b/bureau/class/m_admin.php
index aeb2b276..ffbc8a21 100644
--- a/bureau/class/m_admin.php
+++ b/bureau/class/m_admin.php
@@ -145,6 +145,17 @@ class m_admin {
     }
   }
 
+  # return the uid of an alternc account
+  function get_uid_by_login($login) {
+    global $db;
+    $db->query("SELECT uid FROM membres WHERE login='$login';");
+    if (! $db->next_record()) {
+      return null;
+    }
+    return $db->f('uid');
+  }
+
+
   /* ----------------------------------------------------------------- */
   /** Returns the known information about a hosted account
    * 
diff --git a/bureau/class/m_mem.php b/bureau/class/m_mem.php
index 32181367..d2e9efe6 100644
--- a/bureau/class/m_mem.php
+++ b/bureau/class/m_mem.php
@@ -613,6 +613,7 @@ Cordially.
 
   function session_tempo_params_get($v) {
     global $uid;
+    if (empty($_COOKIE['session'])) return false;
     $sid=$_COOKIE['session'];
     if ( empty($_SESSION[$sid.'-'.$uid]) ) { // si pas de session de params tempo
       return false;
@@ -627,6 +628,7 @@ Cordially.
 
   function session_tempo_params_set($k, $v, $ecrase=false) {
     global $uid;
+    if (empty($_COOKIE['session'])) return false;
     $sid=$_COOKIE['session'];
     $p=Array();
     if ( ! empty($_SESSION[$sid.'-'.$uid]) ) {