CGI Task with window.close in CCstd

System

I am running a workflow via both the CCstd and CCPro interfaces. Under CCPro it opens in a new window, runs and then closes the window via a javascript window.close(); command. When this CGI task is run via the CCstd interface, it takes over the main window and tries to close it when it completes. Is there a way in the code to determine which interface you are running under and behave differently? (i.e. window.close(); if under CCpro and redirect back to TS if under CCstd).