var move:Number = 0;
var keyCode:uint = 0;
var moveFunction:Function;
var movements:Array = [];
movements[Keyboard.LEFT] = [-1, moveX];
movements[Keyboard.RIGHT] = [1, moveX];
movements[Keyboard.UP] = [-1, moveY];
movements[Keyboard.DOWN] = [1, moveY];
stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeydown);
stage.addEventListener(KeyboardEvent.KEY_UP, onKeyup);
function onKeydown(eventObject:KeyboardEvent):void {
	var movement:Array = movements[eventObject.keyCode];
	if (movement) {
		move = movement[0];
		moveFunction = movement[1];
		player_mc.addEventListener(Event.ENTER_FRAME, moveFunction);
	}
	// trace(keyCode);
}
function onKeyup(eventObject:KeyboardEvent):void {
	player_mc.removeEventListener(Event.ENTER_FRAME, moveX);
	player_mc.removeEventListener(Event.ENTER_FRAME, moveY);
}
function moveX(eventObject:Event):void {
	player_mc.x +=  move;
}
function moveY(eventObject:Event):void {
	player_mc.y +=  move;
}