setRolloverIcon(im.getIcon(IconManager.CLASSIFIED_SMALL_OVER));
    ClassifiedButton(ImageNode node)    {    	if (node == null) throw new IllegalArgumentException("No node");        parentNode = node;        setBorder(BorderFactory.createEmptyBorder());  //No border around icon.        setMargin(new Insets(0, 0, 0, 0));//Just to make sure button sz=icon sz.        setOpaque(false);  //B/c button=icon.        setFocusPainted(false);  //Don't paint focus box on top of icon.        setRolloverEnabled(true);        IconManager im = IconManager.getInstance();        setIcon(im.getIcon(IconManager.CLASSIFIED_SMALL));        setRolloverIcon(im.getIcon(IconManager.CLASSIFIED_SMALL_OVER));        setToolTipText(DESCRIPTION);        addActionListener(new ActionListener() {                    public void actionPerformed(ActionEvent e)            {                parentNode.fireClassification();            }                });    }