else if($act=="login") {
    $username = $_REQUEST['username'];
    $pwd      = $_REQUEST['password'];
    $total    = $gen_model->GetOne("count(*) as total ","data_petugas_loket",array('username'=>$username,'password'=>$pwd));
    if(!empty($total)){
        $usr    = $gen_model->GetOneRow("data_petugas_loket",array('username'=>$username,'password'=>$pwd));
        session_start();
        $_SESSION['username']   = $username;
        $_SESSION['loket']      = $usr['loket'];
        $_SESSION['nama_loket'] = $usr['nama_loket'];
        $_SESSION['foto']       = $usr['image'];
        $_SESSION['petugas']    = $usr['petugas'];
        $_SESSION['id_petugas'] = $usr['id_data_petugas_loket'];
        echo "OK";
    }
    else {
        session_start();
        session_destroy();
        echo "NOK";
    }
}