jQuery Spritely

jQuery.spritely is a jQuery plugin created by Artlogic for creating dynamic character and background animation in pure HTML and JavaScript. It’s a simple, light-weight plugin with a few simple methods for creating animated sprites such as the birds you see on this page, and dynamic scrolling backgrounds.

http://www.spritely.net/

You can use it on any html web page, and any part of the page can interact with a sprite (click anywhere on this page and wait and you’ll see what we mean).