With IE 5, for the first time, you can now add a context menu
to your webpage. What's a context menu? Well, it's a custom menu that pops up in
place of the default context menu when you right click your mouse. This custom
menu can do virtually anything you want it to do, although in this script, it's
designed to go to a set of URLs. Demo: Right click anywhere inside this document
if you're using IE 5!