global.asa is a bit tricky to use.
I have done a couple of ASP internet websites without using global.asa at all,
and the shared ADO data connection is in a .inc file. However in our company
intranet website, we do use global.asa to store the ADO data connection so
that all the asp pages can share the same connection in global.asa. Obviously
global.asa can be used to do some other jobs as well.
The reason we use global.asa internally is probably it's easy to control pages
in the intranet. I hope someone else can give better ideas as of using
global.as in ASP.
By the way your href link doesn't seem to work.