User Selectable CSS Style

Hi everyone.

Well as the title states, I am looking for a way to have a user, able to select a preset list of css styles. THis is basically for color (its a Model Car site so Red=Holden Fans Blue=Ford Fans).

I can see that there are plenty of ways to do this directly in the HTML/JavaScript.

But I was wondering if anyone had any suggestions on a more elegant way that maybe utilizes some of the wordpress code or something.

I simply want 2 links at the topbar of the site that will say Style: Holden | Ford. And basically have one a Red based theme and the other a Blue based theme.

Also I can’t seem to find a good way to make the selection sticky. THat is after choosing an revisits on the same browser will give the previously chosen style.