CGI callout question

System

I'm creating a CGI callout in TST5.5.2 that calls a CGI on the TS server. The CGI is a wrapper for another web application on a separate web server on another machine.

In order to allow two-way javascript communication between browser windows whose HTML content is generated from separate machines the "document.domain" property has to be set identically somewher in the Javascript of both windows' HTML.

This means that in the HTML page that is generated to capture data (or in the included javascript file that it uses) , the following would have to be set:

document.domain = 'somedomain.com'

It seems that TeamSite uses a lot of javascript include files, which is nice, since we could insert it there any form that loads it would be taken care of. The problem is, I have no idea where to look. Any ideas?