$tpl->assign('user_name', $_POST['user']);
            $tpl->assign('error', 1);
            $tpl->assign('login', 1);
        } else {
            //primer intento
            $tpl->assign('user_name', '');
            $tpl->assign('error', 0);
            $tpl->assign('login', 1);
        }
        $index_template = 'login.tpl';
    }
} else {
    //usuario registrado en la sesion
    if (isset($_POST['submit']) && $_POST['submit'] == 'Desconectar') {
        $session = new sessions();
        $session->unregister();
        unset($_COOKIE[session_name()]);
        session_unset();
        session_destroy();
        session_start();
        //Se recalcula los m�dulos p�blicos para el men�
        $menu = new menu();
        $_SESSION['public_modules'] = $menu->table_modules(0);
        $tpl->assign('user_name', '');
        $tpl->assign('corp_id', 0);
        $tpl->assign('error', 0);
        $tpl->assign('login', 1);
        $index_template = 'index.tpl';
    } else {
        $tpl->assign('user_name', $_SESSION['user']);
        $tpl->assign('login', 0);