Disable buttons


I’m building a website that has a main swf with buttons that open external swfs which completely cover the main swf. The external swf has a close button to return to the main swf. My problem is when the external swf is open the buttons hiding underneath on the main swf are still active. I want to add code to the button on the main swf to disable itself while opening the external swf. BUT, I also want to reactivate them when I close the external swf. Is there code I can place on the close button of the external swf that will communicate to the main swf to reactivate its buttons? It seems so simple but this is the trickiest part for me.

I’m working with AS2.

Thank You!