Stay on the page when logging in

For instance, when you click 'login' by a comment box, and other places throughout the site, a login form now pops up allowing you to log in and stay on the page. The login box will also pop up when you click 'Add picture to favourites'

The links in the left-hand menu still behave the same however, taking you off the page you are on.

If you come across a link which you believe would benefit from allowing you to login on the page, please let me know, thank you.