jQuery 1.6.4, HTML, CSS, JavaScript
Inspired by Chris Coyier's article here: http://css-tricks.com/14402-radio-buttons-with-2-way-exclusivity/ Added event delegation and value switching.
Rough CSS reproduction of the navigation found at http://beta.rallyinteractive.com/
Mootools 1.4.0, HTML, CSS, JavaScript
No-Library (pure JS), HTML, CSS, JavaScript
Mootools 1.3.2, HTML, CSS, JavaScript