ActionScript 3.0 :: Calling A Function Used On EventListeners

I got a pickle for you: I have a function that is currently connected to an event listener like this:

Code:
loginButton.addEventListener(MouseEvent.CLICK, loginOnClick, false, 0, true);
function loginOnClick(event:MouseEvent):void{
// Login code.
}

Right now I'd also like to call that same function using the ENTER from a keyboard since loginOnClick doesn't use the parameter received (event:MouseEvent). So I did this:

Code:
function keyboardListener(event:KeyboardEvent):void{
if (loginButton){
if (event.keyCode == Keyboard.ENTER && loginButton.enabled) {
loginOnClick(); // Generates an error because it doesn't have a parameter.
}
}
usernameTextField.addEventListener(KeyboardEvent.KEY_DOWN,keyboardListener);

Problem is, of course, AS3 doesn't let you call a function with the incorrect number of parameters or types. I tried following senocula's tutorials on functions and parameters but they don't seem to work on this very specific issue considering the parameter is an event reference.