void applyMouseStyle(String item, boolean shiftKey, boolean alternateKey) {
    item = "(" + item + ")";
    if (pickingStyleSelect == JmolConstants.PICKINGSTYLE_SELECT_PFAAT) {
      if (shiftKey && alternateKey)
        viewer.script("select selected and not " + item);
      else if (shiftKey)
        viewer.script("select selected tog " + item); //toggle
      else if (alternateKey)
        viewer.script("select selected or " + item);
      else
        viewer.script("select " + item);
    } else {
      if (shiftKey | pickingStyleSelect == JmolConstants.PICKINGSTYLE_SELECT_CHIME)
        viewer.script("select selected tog " + item); //toggle
      else
        viewer.script("select " + item);
    }
  }