Navigation Bar

how can i make navigation bar always on top. When I'm on a page i can't see all the projects they are behind the images gallery.

http://hundley.huntercomputersolutions.com/projects/driveways/

 

Hello,

Paste this code in Custom CSS
Appearance > Theme Option > Styling Option > Custom CSS

Code:

div.menu_container {
position: fixed;
top: 20px;
width: 60%;
z-index:9999;
} 

Thanks & Regards
Gourav Shrivastava