Image maps make it possible to have different clickable regions on an image.
Client Side image maps are image maps that do not need CGI scripts to work. Client-side image maps are an HTML 3.0 addition and not useful with older browsers. There is application software available that can help you write these maps. Animated gifs are actually just gif files. Gifs, both 87a and 89a, allow for multiple images to be saved into one file and displayed one after another.