Topic: Fade-out when leaving gallery?


I am customizing my copy of Simpleviewer Pro and have one question:

When loading a gallery, thumbnails and pictures fade in smoothly. When selecting another picture within the same gallery, the last picture fades out, the new one fades in. Very nice! But when selecting another gallery, the old gallery disappears abruptly. Is there a way to create a smooth transition here. Has someone done this succesfully? It looks cheap to start up a gallery this smooth and when leaving it, there is no fading out!