Accessibility

This site employs many features to make information more accessible:

  • All inline images have text alternates (ALT attributes)
  • Pages are organized to be fully functional, even with JavaScript and CSS turned off
  • The site can be navigated without the use of a mouse
  • Page formatting has been achieved using CSS, to ensure that the semantic structure of the information is preserved
  • Relative font sizes have been used, so text can be enlarged or reduced using the text size options available in visual browsers
  • Colours have been checked for sufficient contrast
  • This site follows Web Content Accessibility Guidelines (WCAG)

Minimum browser requirements

This site has been optimised for the following visual browsers, and should also work in AT running on top of these browsers.

  • Windows XP/Vista
    • Firefox 3 (XP)
    • Firefox 3.5
    • Google Chrome 3 (XP)
    • Internet Explorer 6 (XP)
    • Internet Explorer 7
    • Internet Explorer 8
    • Opera 10 (XP)
  • OS X 10.5/10.6
    • Safari 4

Keyboard users

Keyboard users should not be disadvantaged in navigating this site.

  • Pages may be navigated via linear tabbing
  • Links/buttons can be activated, and forms submitted by pressing ENTER
  • Several skip links are provided. Note that these are initially hidden, but become visible when focussed:
    1. ‘Skip directly to main content’: Bypass the search form and site navigation
    2. ‘Back to top’: Return to the top of the document

Changing the text size

Most navigation elements are plain text. We have provided text alternatives to graphics on the site.

Those with poor sight may increase the size of the text on screen. The procedure for doing so differs from one browser to the next:

  • Windows XP/Vista
    • Firefox 3+:
      1. ‘View’
      2. ‘Zoom In’/'Zoom Out’
    • Google Chrome:
      1. Page icon (‘Control the current page’)
      2. ‘Zoom’
      3. ‘Larger’/'Smaller’
    • Internet Explorer 6:
      1. ‘View’
      2. ‘Text Size’
    • Internet Explorer 7/8:
      1. ‘Page’
      2. ‘Text Size’, or ‘Zoom In’/'Zoom Out’
    • Opera 10:
      1. ‘View’
      2. ‘Zoom’
  • OS X 10.5+
    • Safari 4:
      1. ‘View’
      2. ‘Zoom In’/'Zoom Out’

JavaScript

This site uses browser scripting (JavaScript) to:

  1. customise fonts
  2. provide control over the number of comments that are visible on blog pages
  3. improve keyboard usability in Internet Explorer

You currently have JavaScript turned off.

How to enable JavaScript

If you have JavaScript turned off and wish to turn it back on, please follow the steps specific to your web browser:

  • Windows XP/Vista
    • Firefox 3+:
      1. ‘Tools’
      2. ‘Options’
      3. ‘Content’
      4. Check ‘Enable JavaScript’
      5. ‘OK’
      6. Refresh the current web page
    • Google Chrome:
      1. Not possible without leaving the web browser
    • Internet Explorer 6/7/8:
      1. ‘Tools’
      2. ‘Internet Options’
      3. ‘Security’
      4. ‘Custom Level’
      5. Scroll down to ‘Scripting’
      6. ‘Enable’ ‘Active Scripting’
      7. ‘OK’
      8. ‘OK’
      9. Refresh the current web page
    • Opera 10:
      1. ‘Tools’
      2. ‘Quick Preferences’
      3. Check ‘Enable JavaScript’
  • OS X 10.5+
    • Safari 4:
      1. ‘Safari’
      2. ‘Preferences’
      3. ‘Security’
      4. Check ‘Enable JavaScript’