uilang is a minimal, ui-focused programming language for web designers that handles click events, primarily for toggling classes and css display properties. I love the natural language approach to scripting in uilang. You just insert a statement in a code block like this and it works magically:
<code>clicking on ".try-it" toggles class "hidden" on ".info-box"</code>
You still have to write your CSS to handle things like effects, but that's a plus if you don't want or need someone else's implementation of those things. Check it out.
/ht Leon