On your homepage, or frontpage, tell the users to set their resolutions to whatever suits your website best. You can't always try to make a website work for everybody. If you go around trying to make a program like that, I can assure it won't work on some wireless device, or some computer that uses a higher resolution. I'm not saying your idea is bad, because it's not, but a resolution is something for the user to take care of, with the web designer to point them in the right direction.
Correcters: correct me if I'm wrong.
Correcters: you know who you are!