synchronized void setStatusFrameChanged(int frameNo) {
		boolean isAnimationRunning = (frameNo <= -2);
		int f = frameNo;
		if (isAnimationRunning)
			f = -2 - f;
		setStatusChanged("frameChanged", frameNo, (f >= 0 ? viewer.getModelName(f) : ""), false);
		if (jmolStatusListener != null)
			jmolStatusListener.notifyFrameChanged(frameNo);
	}