I\'ve been trying to do as the client requested : redirect to campaign page then to destination page once a customer clicks on the top banner in swf format.
You can check
You can't use javascript to catch click events on top of a flash object. You can find similar questions here and here.
You could suggest to your client that the source code of the flash should be modified to handle the clicks. If this is not possible, then use a container flash object to host the banners.