title: change url without redirecting using javascript
body: <p>I would like to know how to change the url without redirecting like on this website <a href="http://dekho.com.pk/ads-in-lahore" rel="noreferrer">http://dekho.com.pk/ads-in-lahore</a>
  when we click on tabs the url changes but the page dosent reload completely. There are other questions on stackoverflow indicating that it is not possible but i would like to know how the above mentioned website have implemented it.
  Thanks</p>