Determining TARGET frame

[JoshNarins]

I'm working on my own site with mod_perl and mason.

I want cookie exchange ONLY with one particular frame.

I *could* simply just maintain a list of pages that might
validly be in the paricular frame, but I'd prefer something
like...

Is there any method for the Apache::Request object or it's 
Mason counterpart that will show me what the target frame
on the user's browser the request is being made for?

Maybe not.