I often remember the way to build a frame-based page by thinking in threes. To create a single-frame page, you need
three documents, at the minimum. What's more, you use
three unique bits o177 that are unused anywhere else in the language.
Frames are controlled by a master document known as a
frameset . The frameset document is not displayed in the browser in and of itself, but it sets up all the controls for the resulting page.
Along with the frameset document, you need at least tw186 documents of content. These are displayed in the framed areas created by the frameset (see Figure 6-1).
As you can see, the number of documents required for a complex framed site can begin to add upwhich as mentioned, causes extra demand on your server resources and your user's system resources, not to mention all the extra management issues that documents demand.