function colisao(event:MouseEvent):void
{
	trace(event.currentTarget.dropTarget.parent.name);
	trace(event.target.name);

	var dropTargetParentList: Array = ["a1", "b2", "c3", "d4"];
	var currentTargetList: Array = ["a", "b", "c", "d"];

	var failed = true;
	for (var i:int = 0; i < dropTargetParentList.length; i++) {
		var drop_target_parent: String = dropTargetParentList[i];
		var current_target: String = currentTargetList[i];
		if (event.target.dropTarget.parent.name == drop_target_parent && event.currentTarget.name == current_target) {
			trace("certo");
			failed = false; // entrou em algum deles
			//removeAllListeners
			//remove from cards
			event.target.removeEventListener(MouseEvent.MOUSE_DOWN, arrastar);
			event.target.removeEventListener(MouseEvent.MOUSE_UP, parar);
			event.target.removeEventListener(MouseEvent.MOUSE_UP, colisao);
			//remove from target
			event.target.dropTarget.parent.removeEventListener(MouseEvent.MOUSE_DOWN, arrastar);
			event.target.dropTarget.parent.removeEventListener(MouseEvent.MOUSE_UP,reduzir);
			//coloca o OK
			var ok:Ok = new Ok();
			ok.x = event.target.x+50;
			ok.y = event.target.y+20;
			this.addChild(ok);
		}
	}

	if (failed)
	{
		trace("errado");
	}

}