How to shrink navigation menu when scrolling down?

Question

For a new site I am developing I would love to shrink the navigation menu when the user scrolls down.

Something similar to what you can see at the IBM site: http://w

Answer 1

This shrinks and grows the navigation bar as the user scrolls. Created this off of http://www.kriesi.at/themes/enfold/ navigation bar. The version i created works nearly the same. https://github.com/Jlshulman/Elastic-Bar