Avoid using FRAMES, but if you must, please include an accessible alternative, either as a separate page, or by including the accessible HTML for FRAME-unaware browsers.
To create a FRAME-based page, you define your layout between <FRAMESET> </FRAMESET> tags, which are used instead of the normal <BODY> </BODY> tags. Each FRAME is a window containing a separate file which you reference by it's URL.
To create an "alternative" page, you can include standard HTML containing essentially the same information as the FRAME-page. The HTML for the alternative page is placed between <NOFRAME> </NOFRAME> tags and displays only if the user's browser doesn't support FRAMES.
To see how this is implemented, you can view the source code for this file.