Onrollout mc

Hello and thank you ahead of time for any help.
I wish to create a site navigation system similar to the one found on www.jboogie.com
[url=“http://www.jboogie.com/”]
Heres what I have done:
I created a buttons, however as symbols they are movie clips as I tend to use movie clips for functionality over buttons. I then created my box drop animation(box_mc)
I plugged in this actionscript to the maintimeline

button.onRollOver = function(){
box_mc.gotoAndPlay(suchandsuch);
};
box1.useHandCursor=false;
box_mc.onRollOut = function(){
box_mc.gotoAndPlay(suchandsuch);
};

And this pretty much works except in order for the box_mc to ‘rewind’ I have to take the cursor out of it then back in then out again. I wish to make an if statement that says if the user takes the cursor out of box_mc then the mc will gotoAndPlay a specific frame. All the if statements I have tried have been complete failures. If someone could please give me some suggestions. Perhaps I am going about this project completely wrong.
thanks again for any help-
-werther