Professional :: Listeners That Responds To Button / Sliders On Frame

I am writing a little app, and have buttons and sliders on one frame 1 of the stage, and then a help screen on frame 2 of the stage. I have some event listeners attached to the objects of the first frame. When I move to the second frame, and then go back to the first frame, all the event listeners have gone out of scope, and no longer work. (at least that is what I think is happening). I think the best way would be to add something like add Event.ADDED_TO_STAGE listeners to each object, and have the listener function add the event listeners that I want for each item.

So I would have:
public function Document(){
super();
iSlider.addEventListener(Event.ADDED_TO_STAGE, added);
iSlider.removeEventListener(Event.REMOVED_FROM_STAGE, removed);
myButton.addEventListener(Event.ADDED_TO_STAGE, buttonAdded);
myButton.addEventListener(Event.REMOVED_FROM_STAGE, buttonRemoved);
}
In each of the listeners, I would add / remove the listeners that actually respond to the button / slider.