How to flip background image using CSS?

Question

How to flip any background image using CSS? Is it possible?

currenty I\'m using this arrow image in a background-image of li in css

Answer 1

For what it's worth, for Gecko-based browsers you can't condition this thing off of :visited due to the resulting privacy leaks. See http://hacks.mozilla.org/2010/03/privacy-related-changes-coming-to-css-vistited/