code: public void setSelectedItem(JScoreElement elmnt){
  		if (m_selectedItems!=null) {
              for (Object m_selectedItem : m_selectedItems) {
                  ((JScoreElement) m_selectedItem).setColor(null);
              }
  			m_selectedItems = null;
  		}
  		if (elmnt!=null) {
  			m_selectedItems = new Vector(1, 0);
  			m_selectedItems.add(elmnt);
  			elmnt.setColor(SELECTED_ITEM_COLOR);
  		}
  		repaint();
  	}
docs: Highlights the given score element in the score.
  If an item was previously selected, this previous item
  is unselected.
  @param elmnt The score rendition element to be highlighted in the
  score. <TT>null</TT> can be specified to remove
  highlighting.
  @see #setSelectedItem(MusicElement)