title: flash AS3 how do I remove stage event listeners
body: <p>I'm building an animation in flash and as3, I have a function in which I add a stage 
  eventListener, stage.addEventListener(Event.ENTER_FRAME, setScrollPercent, false, 0, true);</p>
  
  <p>Since this event is set inside a function of a function, "two functions deep," How can I reset all stage event listeners from outside of the functions without getting an error? </p>