Using JavaScript to Style Active Navigation Elements
http://www.cssnewbie.com/using-javascript-to-style-active-navigation-elements/

Glazebrook, Rob L.
CSS Newbie
2009

Abstract:

I’m all about efficiency when I’m writing web code. Any time I find myself writing the same functionality more than once or twice, I try to consider whether my repeated code could be wrapped into a function of some sort. Navigation is often one of those areas where I try to improve my efficiency.