There is a javascript function that allows you to change the url, so you can cha...

keeperofdakeys on Aug 10, 2011 | parent | context | favorite | on: 535 ways to reload the page with JavaScript

There is a javascript function that allows you to change the url, so you can change the url when the page changes (like infinite scroll), so that going to one url and back will land you on the page you left (I think it is pushState() ).