Memory leak...

I have a client who has a home page that I built for him. Basically there are words randomly displayed in the background. Then there are three images that rotate based on a timer. So I have two timers going. I have event listeners added to the images when the app starts. I'm moving the image off the stage when it's not visible. So I'm not adding and removing listeners over and over. However, if you watch the browser memory usage in all three major browsers it climbs several mb's in a minute. Therefore, if the user sits on the homepage the browser crashes. Ideas of why?

Thanks