} else {
    switch ($task) {
        case "add":
            // use 'add' instead 'new' in J 1.6
            menubooklibrary::MENU_SAVE_BACKEND();
            break;
        case "edit":
            menubooklibrary::MENU_EDIT();
            break;
        case "refetchInfos":
            menubooklibrary::MENU_REFETCH_INFOS();
            break;
            /////////////////////////st5/////////////
        /////////////////////////st5/////////////
        case "Addproduct":
            menubooklibrary::MENU_ADD_TOVAR();
            break;
        case "show_import_export":
            menubooklibrary::MENU_IMPORT_EXPORT();
            addSubmenuBookLibrary("Import/Export");
            break;
        case "lend":
            menubooklibrary::MENU_LEND();
            break;
        case "lend_return":
            menubooklibrary::MENU_LEND_RETURN();
            break;
        case "lend_requests":
            menubooklibrary::MENU_LENDREQUESTS();
            addSubmenuBookLibrary("Lend Requests");
            break;