var my_B:Boolean = false;
my_mc.onEnterFrame = function() {
if (!my_B) {
my_mc.prevFrame();
} else {
my_mc.nextFrame();
}
};
my_mc.mc_bg.onEnterFrame = function() {
if (my_mc.mc_bg.hitTest(_root._xmouse, _root._ymouse, 1) == false) {
my_B = false;
my_mc.prevFrame();
}
};