Possible Duplicate:
Modify the URL without reloading the page
I just came across this site, http://www.so-design.co.uk/#/brand/1 , if you use the slider it changes the image just like any normal image slider but it also changes the url to /brand/1, /brand/2 ect which i suppose means that all the slides and their content are crawled by search engines as individual pages
any ideas how they are doing this ? cheers