Spritely is a jQuery plugin for creating dynamic character & background animations using HTML + JavaScript.

With the power of JavaScript, the animations can be controlled on events (clicks, mouseovers) easily.

jQuery Spritely

Animated elements can fly over the page without effecting any other element (can be ideal for floating-type banners) & the page still remains accessible.

Specially, for the platforms where Flash is not supported, Spritely can be an alternative (like iPhone, iPad).

It works in all major browsers including IE6.

via Sprite Animations With jQuery: Spritely.