Button.onRollOver problem

1

Well i am using the code:
[AS]
button.onRollOver = function(){
this.gotoAndStop(2)
}
[/AS]

But the thing is i want to make it so when i roll over the movieclip with the instance name “button”, it will gotoAndStop on frame 2 of a DIFFERENT movieclip (which is located on _root). Can someone tell me how to do this?

I thought it might look like this:
[AS]
button.onRollOver = function(){
_root.button.gotoAndStop(2)
}
[/AS]
But that doesn’t seem to work.

Thanks

Mike

2 

button.onRollOver = function(){
    _root.movieInstanceName.gotoAndStop(2)
}