First off, take a look at what you can create using this object: demo-frames.html. It is a page with 2 scroll windows where one loads pages into the other to mimic frames.
I've tested this code out on various versions of Netscape 4.0 and 4.5 on Windows, Mac, and Linux, and all seems to be working pretty well except a few of the more advanced functionality on some versions of Mac. I don't have a Mac to work on so I have to rely on input from developers for fixes. Please notify me about any problems you encounter with this object.
There's a lot stuff to explain so I've separated this column into the following sections: