Interaction Scripter Developer's Guide
Interaction Scripter does not directly support frames. Frames can be used, so long as functions in child frame windows call objects and functions in the top-level window. Scripter only recognizes objects and functions in the top-level window. These objects and functions in the top-level window must call down through the object model to the child windows. This requires a working knowledge of the well-documented Internet Explorer Document Object Model, and is entirely the responsibility of the end user.
If frames are used, script developers should give each frame a name using the name attribute of the frame or iframe element. This allows Interaction Scripter to identify events that are specific to the frames, which can result in improved performance.