You probably have seen web pages that use frames.
Frames are a way of breaking up a web page into two or more parts.
A framed web page is actually displaying two or more separate web pages at once. You can usually identify a framed page if you click or scroll in one area of the screen and the other sections remain constant. While this may sound like a neat feature, the usefulness of frames has been the subject of debate for many years among web designers. The overwhelming consensus, at least from a user standpoint, is that frames do not constitute good web page design and, therefore, are not recommended for use on UD department or college home pages. Years ago, frames presented many problems for users because of browser limitations.