Course window size

Is there any way to execute the external HTML object once and only once upon course launch? If the user wants to move/resize the browser after the javascript has executed, it's annoying if the browser window keeps jumping back to the spot I move it to. This could be especially annoying for users with 2 monitors who want the course window on their 2nd monitor.

I tried implement a "Run Once" Action Group using a conditional and a variable, but it seems to defy logic how to get this working in Lectora.

Any clue?