Buttons to change CSS

[Lluis Sasplugas]

Hi Guys,
I have a page showing a rather long tiddlers list.
Each tiddler is shown with it's title and contents. Due to this the page shows too much information.
By now on what I can do is hide the contents by modifying my CSS:

A) .content {display: none} /* to hide the contents */
B) .content {display: block} /* to show everythnig: title and contents */

The question is that i want to chose between A or B without having to edit my CSS.
I'm thinking about placing a pair of buttons (A and B) on the MainMenu so as that on clicking them my CSS could be automatically modified.

Is there any way to do this?

Thanks