Frames are an extension to HTML introduced by Netscape Communications and first implemented in Netscape Navigator 2.0. Netscape Communicator and Netscape Navigator as well as Internet Explorer all support frames. Lynx 2.6 and later also supports frames in a very limited fashion. However, older browsers or those with fewer features do not support frames.
Frames allow several documents to exist in a single browser window.
Each document can have its own scroll bar, and be resized independently of the main browser window. Each frame can also be given its own name, which can then be targeted by other URLs. The advantage of frames is that you can have some frames that are static, while the URLs of surrounding frames change. For example, a static frame can be used as a table of contents while another frame presents the different Web pages of a site. Click the frame for the URL you want.