Is there a way to see what eventListeners currently exist?

Question

I've currently got a function in which a event listener is
added (addEventListener(Event.ENTER_FRAME, create Animation) but I
am calling the function repeatedly in my program it is giving me an
error:
ArgumentError: Error #1063: Argument count mismatch on
Projectv017_fla::MainTimeline/createAnimation(). Expected 0, got 1.
Which I assume is an error saying that this event listener
already exists. Is this correct? If so, I'm wondering if anyone
knows if there is a way I can see whether the listener already
exists so I can write an if statement around the addEventListener
so that it only creates the event listener if it doesn't already
exist. I want to do this because I want to add and remove the event
listener occasionally in my program because I don't need it to
always be running, but want it to be turned on and off.

Answer 1

What is the syntax for your function? It should be:
function createAnimation(e:Event):void {}
If you want to check if the listener exists:
hasEventListener(Event.ENTER_FRAME)