}
break;
case 'delete':
$id = $_POST['id'];
$res = $bk->del_item($id);
if ($res) {
$response->res = true;
$response->mes = $mes->get_msg("e006");
} else {
$response->res = false;
$response->mes = $mes->get_msg("e007");
}
break;
case 'get_bookdata':
$id = $_POST['id'];
$res = $bk->get_item($id);
if ($res) {
$response->res = true;
$response->id_book = $res[0]["tb_id"];
$response->t = $res[0]["tb_title"];
$response->i = $res[0]["tb_isbn"];
$response->a = $res[0]["tb_autor"];
$response->g = $res[0]["tb_gender"];
$response->r = $res[0]["tb_released"];
$response->mes = null;
} else {
$response->res = false;
$response->mes = $mes->get_msg("e008");
}
break;
case 'edit':
