Browser previous button and modal window

Question

I need the following functionality when I open any modal window or look at photos (fancybox), previous button in browser should show me the page from which I opened the modal window or photo.

Answer 1

I found answer:

1. For fancybox http://jsfiddle.net/R82gF/
2. For modal window work with history.pushState OR history.replaceState, http://railscasts.com/episodes/246-ajax-history-state