public function action_delete()
 {
     $cm = new ClientManager(DB::get_instance());
     $clt = $cm->get($this->req->id);
     $this->site->ajouter_message("ok");
     $cm->delete($clt);
     $this->site->ajouter_message($clt->getMail() . " supprimé!");
     Site::redirect("admClient");
 }