Popup menus, relative to a link

Move your mouse over the links in this paragraph to see menus opening below them. Like this link to the About UDM section, or this one to the Help and support page. Finally, here's a link to the Demos page.

This demo uses one of the following configuration files:

Javascript configuration (for ASP config add <% %> instructions and rename)
PHP configuration

And the following images:

The menu-handling code looks like this: