function changepwd()
 {
     $retour = true;
     $oldpwd = Db::escape($_POST['old']);
     $newpwd = Db::escape($_POST['new']);
     $verifpwd = Db::escape($_POST['verif']);
     $login = Db::escape($_POST['login']);
     $getLogin = Query::connexionLogin($login);
     if (Db::num_rows($getLogin) > 0) {
         $this->login = $login;
         $getPwd = Query::connexion($login, $oldpwd);
         if (Db::num_rows($getPwd) > 0) {
             if ($newpwd != $verifpwd) {
                 $this->errors = "changeVerif";
                 $retour = false;
             } else {
                 Query::updatePassword($newpwd, $login);
             }
         } else {
             $this->errors = "pwd";
             $retour = false;
         }
     } else {
         $this->errors = "login";
         $retour = false;
     }
     return $retour;
 }