Navigate on Main Timeline using Custom .as

Question

OK, I'm back, and I have another issue that's bogging me down.
The project I am working on has individual frames, each of which holds separate movie clips.  Within those movieclips are buttons which allow the user to navigate to the next frame in the main timeline.  The button objects are different in each frame, so these aren't objects that I can just put on the main timeline (some are nested within several objects)
I want to be able to use a line like:
myButton.addEventListener(MouseEvent.CLICK, rootnextframe);
and not have to always then follow that up with the function declaration. I've tried just declaring the function on the main timeline, but when the script within the objects call the function, it doesn't see it.
I have created an actionscript file that reads:
package {
    public function rootnextframe():void {
        MovieClip(root).nextFrame();
but I get the errors:
Call to a possible undefined method MovieClip.
Access of undefined property root.
So, clearly, I'm going about this all wrong.  I feel like it's a waste to have a function that has only one line, but I can't think of any other ways to do what I'm trying to get it to do.  Anyone have any ideas?

Answer 1

I have to run but here's another approach that you can take:
In the code (probably an event listener) where you determine what frame you're on ( 3 or 6 ), dispatch a new custom bubbling event, and then listen for that event in the main timeline.
Pseudo code:
function nextFramePopup(event:Event)
     if (currentFrame == 3)
          //doStuff
          dispatchEvent(new Event("advanceFrame", true));
     else
          //doOtherStuff
          //popUpWindow()
and in main timeline on frame 1
addEventListener("advanceFrame", handleAdvanceFrame);
function handleAdvanceFrame(event:Event):void
     //do your next frame thing here
ts