Your code is engenius, it really is. That totally fools the browser into thinking it's something it can't cache and it worked. That's utterly amazing, thank you for this tip!

And thank you to the others. I didn't know an image will stay in cache as long as the name and size doesn't change. I just thought it reloaded the image if it realizes the page has been updated since the last time it's visited. Thanks for that information.