Possible Duplicate:
Change the URL in the browser without loading the new page using JavaScript
Example of what I'm trying to do:
User is at /things/list
, then clicks 'new thing' which takes them to /things/new
they fill in the needed info for the thing click save and the url changes to /things/123
and then they click the back button in their browser and it takes them to /things/list
instead of /things/new
. Is something like this possible?