firePropertyChange(ROLLOVER_CHANGED_PROPERTY, ! rollover, rollover);
firePropertyChange("rollover", ! rollover, rollover);
  public void setRollover(boolean b)  {    if (b != rollover)      {	rollover = b;	firePropertyChange(ROLLOVER_CHANGED_PROPERTY, ! rollover, rollover);	revalidate();	repaint();      }  }