Your website can be organised into frames, that is, several pages within a frame using the frameset tag <frameset></frameset>. Like tables, the pages are organised into columns and rows. Each frame is given a name and a target page to load.
In Example 1, there is one page, which acts as the frame and two other pages nested within the page. In Example 2, there are three pages nested within the frame.
Next: Example 1