title: How to implement a "back" button on an ajax loaded page
body: <p>I don't know how this is possible but I've seen it in big sites like Facebook and Twitter. I'm using jQuery in prototype to load pages (Ajax-wise). So I want to know how to implement a 'back' button such that when a user clicks back on his/her browser he/she is taken back to the previous page. I believe since it's Ajax, the page is not actually changing so in what way this can be done? Thanks in adv</p>