Access keys

Most browsers support jumping to specific links by typing keys defined on the web site. On Windows, you can press ALT + an access key; on Macintosh, you can press Control + an access key.

All pages on this site define the following access keys:

  • Access Key 0 - Accessibility statement
  • Access Key 1 - Home page
  • Access Key 2 - Search
  • Access Key 3 - Terms of use
Standards compliance

Level A conformance icon,W3C-WAI Web Content Accessibility Guidelines 1.0 All pages on this site is WCAG A approved, complying wih all priority 1 guidelines of the W3C Web Content Accessibility Guidelines. Again, this is a judgement call; many guidelines are intentionally vague and can not be tested automatically, however we have reviewed all the guidelines and believe that all these pages are in compliance.

Valid XHTML 1.0! All pages on this site validate as XHTML 1.0 Strict. This is not a judgement call; a program can determine with 100% accuracy whether a page is valid XHTML. A link to check XHTML validity is provided in the footer of each page.

Navigation aids

All pages include a search box (access key 2).


Many links have title attributes which describe the link in greater detail, unless the text of the link already fully describes the target.


All content images used in this site include descriptive ALT attributes. Purely decorative graphics include null ALT attributes. Complex images include LONGDESC attributes or inline descriptions to explain the significance of each image to non-visual readers.

Visual design

Valid CSS 2.0! This site uses cascading style sheets for visual layout. This site uses only relative font sizes, compatible with the user-specified "text size" option in visual browsers. If your browser or browsing device does not support stylesheets at all, the content of each page is still readable.

Accessibility references

For a full explanation of the reasons behind these guidelines, please read the following document.
W3 accessibility guidelines