how to change url at address bar without reloading the page

Question

I have http://mysite.com/index.php.

And a sub menu

• home => http://mysite.com/index.php
• about us => http://mysite.com/about.us.php
• pro

Answer 1

How does Shopify do it then? Go to their website, click on the Features link and you'll see the URL says:

http://www.shopify.com/tour/sell-online

Then click on any of the sub links and you'll see that the address in the URl changes without using a hash but there is no page flip.

I don't think they are using ajax to change the content because it all appears to be included in hidden divs on the page, but regardless, you can apparently change the URL using client side tricks.