public void unHighlightPanel(PanelName panelName)
    {
        Color defaultColor = this.getBackground();
        switch (panelName)
        {
            case PANEL_NORTH:
                northPanel.setBackground(defaultColor);
                break;
            case PANEL_SOUTH:
                southPanel.setBackground(defaultColor);
                break;
            case PANEL_WEST:
                westPanel.setBackground(defaultColor);
                break;
            case PANEL_EAST:
                eastPanel.setBackground(defaultColor);
                break;
            case PANEL_NORTH_WEST:
                northWestPanel.setBackground(defaultColor);
                break;
            case PANEL_NORTH_EAST:
                northEastPanel.setBackground(defaultColor);
                break;
            case PANEL_SOUTH_WEST:
                southWestPanel.setBackground(defaultColor);
                break;
            case PANEL_SOUTH_EAST:
                southEastPanel.setBackground(defaultColor);
                break;
            default:
                System.out.println("ERROR! unHighlightPanel()");
        }
    }