2.3 A simple contact form:
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Try tabbing through this form. Note that the required fields change the message if you don't enter a value.
Note the help links. Clicking on one expands the help in an accessible manner shifting focus to the help heading.
Accesskey associated to the first label, the standard for this would be "9" under the UK Government eGIF "standard".
Note: It is now a UK legal necessity for users to actively state that their details may be used. Even for such things as newsletters. This means, in the case of the "subscribe to newsletter" checkbox above, that the checkbox cannot be checked as default.