Once important consideration to be aware of is screen resolution. Once a site fits nicely into all the commom screen resolutions, the actual layout must be scrutinized. One passing trend among web authors is the use of frames. Frames were unique and interesting at first, but it quickly became obvious how inconvenient frames really are. Frames divide precious screen real estate into even smaller chunks of space which make it even more difficult to decide how to allocate space.
Frames also make it difficult for the user to bookmark certain areas of a web site.
Instead of bookmarking a nested page, the user will end up bookmarking the main page of the site. A more reliable way of defining the actual layout of a page involves the use of tables. Also, tables are supported by almost every browser available today, ensuring compatibility. Tables solve this problem.