code: public byte[] getPosition(byte field) {
  		Iterator it = m_fieldsPosition.keySet().iterator();
  		Byte B = field;
  		while (it.hasNext()) {
  			Position p = (Position) it.next();
  			if (((Vector) m_fieldsPosition.get(p)).contains(B)) {
  				return new byte[] { p.m_vertical, p.m_horizontal };
  			}
  		}
  		if (field != ScoreElements._DEFAULT) {
  			return getPosition(ScoreElements._DEFAULT);
  		}
  		return null;
  	}
docs: Returns position of a field
  
  @param field
  one of {@link ScoreElements} constants
  @return an array of 2 bytes : [VerticalPosition.xxx, HorizontalAlign.xxx]
  <TT>null</TT> if position has not been defined