How to track scenes viewed and display image A or image B based on scenes viewed

Question

I have an interactive story divided into scenes. At the end of each scene a button appears. This occurs on a frame on the timeline.
There are two different buttons that might appear based on whether a prior scene has been viewed or not.
For example, there are Scene_1 and Scene_2. At the end of Scene_2 one of two buttons will appear. The buttons will be either "Go see Scene_1" or "Return to Main Menu".
If the user has already seen Scene_1, Flash will know that and automatically go to the frame in Scene_2 that contains the button "Return to Main Menu".
Conversely, if the user has not seen Scene_1, Flash will know and automatically go to the frame in Scene_2 that contains the button "Go see Scene_1".
I imagine there would be an action frame at the end of Scene_2 that will contain the as2 code to enable this action.
Perhaps something like, but probably not at all like the following:
if ("Scene_1", last frame == true){gotoAndPlay("frame#");}else{gotoAndPlay("frame#");}
Any help is greatly appreciated.
Thanks!
Jerry T

Answer 1

create an array.  at the end of each scene push the data you need to judge that scene's been viewed.  use that array at the end of each scene to determine what buttons to present.