Control MC based on button._y?

I'm working with Flash MX and have a slider that moves down a menu, based on either the mouse position or (if the mouse isn't over the menu), based on the main timeline's frame.

What I'd like to do is play a movie clip that's syncronized to the menu. If the slider is over the first picture, I'd like to gotoAndStop on a specific frame of the movie clip.

The slider is called slider and the movie clip is called opacity. I tried to attach the AS to the opacity clip, but it didn't work, so now I'm writing the AS directly onto the main timeline.

Here's what I have:


_root.onEnterFrame = function() {
if (this.slider1._y <= 182.9){
this.opacity.gotoAndStop(2)
}
else
this.opacity.gotoAndStop(1)
}


However, the movie clip is stopping on frame 2 and NOT changing when the slider's y-position is changed. Any ideas on where I'm going wrong?

Thanks in advance!

I solved it. Looks like using "_root" and "this" were giving me the problems.

onEnterFrame = function() {
if (slider._y <=182.9) {
opacity.gotoAndStop(2);
}
else
opacity.gotoAndStop(1);
}