Unload a movie?!?!

hi all

ive got this main.swf and i have created this movieclip with a instance named loader. so far so good. within the swf that is loaded into the moviclip (instance named loader) there is a button…how can i get that button to unload or close down (wateva term is used) the movie that is loaded into the movieclip with the instance name loader???

thnx for any feedback :smiley: