How to let an no-refresh and redirect a page?

Question

Possible Duplicate:
How to rewrite URL without refresh, like GitHub.com

For example,Google Plus's navbar done it: If you click a navbar's button,you will see a div is updated,and the URL is changed. Can't ajax?How to do it? Thanks for your help :)

Answer 1

not ajax,it seems unlikely. but you can imitate to update but url is not changed

<a href="###" onclick="update()"/>

the function update,you can send a request by ajax

Answer 2

They do 3 things:

1. Load the data by using ajax
2. They change the url of the page (notice - the page is not loaded, just the querystring changes).
3. They push this url to the history of the browser.

all these are possible with the use of javascript.