This site is utilizing skip links to improve mouseless browsing. Skip links are links to another part of the page that allow visitors to navigate their way around a web document, without having to cycle through a huge list of links. They will be seen when tabbing through the page, and can be activated by hitting enter key when visible.
An access key is a keyboard shortcut that allows you to immediately jump to a web page or specific part of a web page. Activating access keys varies between web browsers and operating systems. In Internet Explorer they are activated by hitting the Alt button and the access key at the same time, while in Firefox it is Alt, Shift, and the access key. On a Mac, it is Control and the access key. The access keys for this site are: