hi i am building a site using mainly css for the first time,
my main content box is fine but to the left i have a sidebar menu and the box is open, anyone know how i close this please?
i also want to create the same type of box but a long horiztonal one across the bottom, any help with how i do that too would be greatly appreciated

thank you

(can be seen on this page)

http://www.cgwebdesigns.co.uk/oldstuff/index.html