Can anyone help me with some codes ???

Hello,
I'm a photographer making my own website in flash.
My old one used to be smaller, but the new site is designed for a 1280x1024 screen because most screens has a high resolution these days.

Is there any codes that I can write in the index.html so that my large resolution design will adjust to the visitors possible smaller resolution
screens ?
Cause right now it's huge in some cases.

Hope anyone is able to help ?
thanks !