What is a Fisheye? The idea behind a fisheye control is a strip of icons, being vertical or horizontally laid out that reacts to the user's mouse as it approaches the icon. This control was made popular by Mac OSX "Dock". Why use a Fisheye It improves usability and reinforces to the user that this is an interactive component which is ready to respond to the user's action. How do I use this Fisheye? While there are plenty of implementations of this control, which I will link to at the bottom of the article. I believe this approach leaves less stress for the implementor than most. It of course uses prototype and harnesses the DOM Extension methods to enhance performance and reliability across the browser board. It also uses an event style architecture to allow for convienence of attaching methods to a particular item being clicked etc.