Possible Duplicate:
How to change the URL displayed in the browser without leaving the page
How to do awesome refreshless page changes like GitHub
Change browser URL and page content without reload and without using fragments
It is amazing! The new Dropbox web version can do this! It will do ajax request and change the url,but the page will not refresh!(not change the hash)
The url will change from https://www.dropbox.com/home/ to https://www.dropbox.com/home/Public.
You can try it.
How to achieve it?