public void setChangable(boolean b) {
		changable = b;
		if (b) {
			questionBody.getHtmlPane().removeLinkMonitor();
			if (!isChangable()) {
				if (choices != null) {
					for (AbstractButton x : choices)
						x.addMouseListener(popupMouseListener);
				}
			}
		}
		else {
			questionBody.getHtmlPane().addLinkMonitor();
			if (isChangable()) {
				if (choices != null) {
					for (AbstractButton x : choices)
						x.removeMouseListener(popupMouseListener);
				}
			}
		}
	}