Controlling Sounds


I’ve built a website that displays it’s different types of content by loading movies into different levels. Most of the “Content” .swf’s have sounds placed on thier timelines, as well as some sounds on the timeline of the main movie. All sounds were added directly to the timelines, rather than being made into objects.

My question is:
Is there any way to make a master “Sound Off/On” button that will Mute/UnMute all sounds on all timelines, even of movies that may not have been loaded yet?

Thanks for any help you can give me!