public void removeLayoutComponent(Component component) {
		if (component == viewport)
			viewport = null;
		else if (component == vsb)
			vsb = null;
		else if (component == hsb)
			hsb = null;
		else if (component == rowHead)
			rowHead = null;
		else if (component == colHead)
			colHead = null;
		else if (component == lowerRight)
			lowerRight = null;
		else if (component == upperRight)
			upperRight = null;
		else if (component == lowerLeft)
			lowerLeft = null;
		else if (component == upperLeft)
			upperLeft = null;
	}