Virtual

I have a very annoying problem. I have a form that uses Javascript to open a new window with a popup menu. The popup menu should contain values related to the value selected in another popup in the parent window. PHP is used to fetch these values from a database, and that all works fine. The problem is that I can't pass the value of the parent window's popup. Virtual, for whatever reason, does not act like a regular HTTP include, since it does not allow you to pass a query string. Is there a way I can make this work? Regards jh