I can't make jQuery add a class to the link (inside a list). I should click the link, load the page, and the link I have clicked should have a different color in order to show the user which page is actually active.

I'm basically using stuff from this tutorial:
http://css-tricks.com/dynamic-page-replacing-content/

Here's my version (I modified just a little bit):

http://jsfiddle.net/6skKe/


Thanks in advance.