void hover() {
		if (!viewer.isHoverEnabled())
			viewer.setHoverEnabled(true);
		String strLabel = (String) statement[1].value;
		if (strLabel.equalsIgnoreCase("on")) {
			strLabel = "%U";
		}
		else if (strLabel.equalsIgnoreCase("off")) {
			strLabel = null;
		}
		viewer.loadShape(JmolConstants.SHAPE_HOVER);
		viewer.setShapeProperty(JmolConstants.SHAPE_HOVER, "label", strLabel);
	}