You don't need to include any code, we can get it all from the link.
I'm not sure what you want to do though, a better explanation might help.
The first thing I noticed was #wrapper doesn't scroll up far enough to see the contact information at the bottom. Add these bits highlighted in red and see how that works for you -
border: thin none #000000;
margin: 0 auto 50px;
to learn how overflow: auto; clears your floats.