This website according to the principles of accessible web design build, the main content of the site is divided into four blocks:
1. The top of the functional blocks, 2 blocks on the left navigation, three central content blocks, 4 blocks related links to the right.
Shortcuts ( Accesskey ) this site are set as follows:
Alt+U：Top of the functional blocks, including Home, Sitemap, Site Search, font selection, version selection.
Alt+L：Navigate the left block, this site's main menu area.
Alt+C：Central content block, as the main content area of this page.
Alt+R：Information on the right block, links to other relevant areas.