Frames vs CSS layout

Ok… so here is why this thread is here:

[LEFT]My mother is creating a site for her friend… It currently uses frames, I recently told here to use CSS (that i would make what she wanted) but oh not she would not agree to me that most websites use css and most designers use css… So i am going to prove it! :slight_smile:[/LEFT]
[RIGHT] [/RIGHT]
[LEFT]So please vote in the poll which is better :P[/LEFT]