else if (e.key === 'j') {
            if (_CodidactKeyboard.selectedItem == null) _CodidactKeyboard.selectedItem = $("[data-ckb-list-item]:first-of-type")[0];
            else {
                _CodidactKeyboard.selectedItem = $(_CodidactKeyboard.selectedItem).prevAll('[data-ckb-list-item]')[0] || _CodidactKeyboard.selectedItem;
            }