private void selectAction() {
    if (_list != null && _list.getSize() > 0) {

      if (_list.get(_list, _list.getSelectedIndex()) != null) {
        DocumentInfo trainInfo = (DocumentInfo) _list.get(_list, _list.getSelectedIndex());
        if (trainInfo != null) {
          DocumentDetailScreen scr = new DocumentDetailScreen(trainInfo);
          UiApplication.getUiApplication().pushScreen(scr);
        }
      }
    }
  }