code: public JScoreElement getScoreElementAt(Point location) {
  		JScoreElement scoreEl = null;
  		for (int i=0; i<m_staffLines.size(); i++) {
  			scoreEl = ((JStaffLine)m_staffLines.elementAt(i)).getScoreElementAt(location);
  			if (scoreEl!=null)
  				return scoreEl;
  			scoreEl = null;
  		}
  		return scoreEl;
  	}
docs: Returns the part of the score (as a JScoreElement instance) located
  at a given point.
  @param location A location as a point.
  @return The part of the score (as a JScoreElement instance) located
  at a given point. <TT>NULL</NULL> is returned if not JScoreElement is
  matching the location.