If you’re looking for an easy to use effects library for your web application, moo.fx could be what you’re looking for.
moo.fx is a superlightweight, ultratiny, megasmall javascript effects library, written with prototype.js.
It’s easy to use, fast, cross-browser, standards compliant, provides controls to modify Height, Width, and Opacity with builtin checks that won’t let a user break the effect with multiple crazy clicks. It’s also optimized to make you write the lesser code possible.
Using this library is a simple task, and can take your web application interaction to higher levels.