Frame and Table Elements
Some interactive documents, such as this Reference, use frames to display the contents of different documents, or different sections of the same dcument on the screen at the same time in windows.
Tables
Frames with no borders are also useful for creating pages with seamless graphical backgrounds, where a different colour or texture is contained within each frame. Special HTML documents are necessary to produce such presentations. Their purpose is simply to divide the current frame into areas into which documents can be loaded. They also specify the initial document to be loaded into each fram. A page that produces a frame layout does not have a <BODY>; rather it has a <FRAMESET> tag, which has no other purpose than to specify frames.
Frame sets can be nested to produce more complex layouts, also documents that contain a <FRAMESET> can be loaded into a frame. The <FRAME> tag must be used in conjunction with the <FRAMSET> tag.