Unloading an external movie -fading

I have this fully integrated site where the menu(which loads from different swf) loads external swf into a container. Whenever a new bottom i selected i want the swf in the container to fade out. Can i add a script to my present code that fades the container “contact” out.

on (release) {

unloadMovie (_root.bg);
unloadMovie (_root.contact);
loadMovie("content/historie.swf", _root.contact);

}
on (rollOver) {
tellTarget (“historie”) {
gotoAndPlay(2);
}
}
on (rollOut) {
tellTarget (“historie”) {
gotoAndPlay(11);
}
}

I really hope you experts can help

/kafir