How to move banner in theme twentytwelve ?

By default in twentytwelve, the banner is under the nav menu, how to move it above just before the menu and behind the title of the website ?

Just add these two lines in style.css of child theme.

#page {background: #ffffff url( no-repeat top center;}
hgroup {height:182px;}

The first line inserts image pre-saved in Media Library. The second line moves the navigation menu just under the banner.