Basic HTML text editor?

Hi guys. Does anybody know how I would go about building a textarea with some basic formating in HTML (with Javascript or whatever)?

All I want to have, is a basic Textarea with some very basic formating buttons, eg. BOLD, ITAlIC, and UNDERLINE. Thats it!
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The textarea will be used in the backend of my site so the client can update the content themselves. I have used FCKeditor before but the client seemed to have too much control, and it screwed up my great design with ugly formated text. And the code output was horible. Filled with FONT tags, and other unwanted HTML formating, that conflicted with my stylesheets.

Can anyone explain how to do this, or point me to another post, or a tutorial?

Thanks heaps,
TandemAdam