help with koolmoves exchange menu1

[jarnold]

Hi,
Want to thank Bret for his help so far. I've been looking at flash exchange example menu1. It calls up 3 .swfs to play within the stage. Each button calls up one swf. I would like to know if it is possible to stop another swf being played if one is already playing.
code to play swf
on(release){
gotoAndPlay("one")
mc4.loadMovie("one.swf");
}
thanks,
ja