Hi, Ellen,
Is this WebHelp that you're planning to develop, and not
compiled HTML Help (.chm)?
If the former, I think you should be able to achieve what you
want by using JavaScript to construct the hyperlinks dynamically.
For example, using the location.host property, you can get the host
portion of the current URL ("www.location1.com"). Then you can
append the rest of the URL to it.
I've attached some (untested) script that may give you some
ideas.
For compiled HTML Help, there may be some mileage in using
the techniques illustrated in Scott Prentice's "CUD (ChmUpDate)
Files" sample, available here:
http://www.leximation.com/downloads/cud-sample/
This allows you to read into a .chm file some text strings
that are defined in an external file. It's possible that your
software developers can manipulate the contents of this file
programmatically in order to, for example, add the customer's
location to it. Then you can use the techniques illustrated in the
sample file to include the location in your hyperlinks.
Pete