• Web Design,
• Search Engine Optimization,
• Web Content Accessibility
• Education

W3C Web Content Accessibility Guidelines 1.0 explains how to achieve better Web Design for people with disabilities or that are browsing the Web under some constraints (mobile phone, noisy or hand-free environment, Lynx browser, etc.) Some examples:

Colours that are necessary to the document should be explained in text. Unecessary colour information should be given in style sheets, so that the user can change it if necessary with their own style sheets.

It is a good idea to have contrasting background and foreground colours, especially for text.

Images important to the content should be described in text, using the longdesc img attribute.

Animation should be achieved at a good speed (not too fast, not too slow) and it should be possible to stop or pause.

Icons and images can be useful for people with cognitive or learning disabilities, etc.

Table structure (head, body) should be defined and summary of tables should be provided where necessary.

It is a good idea to provide alternatives to the use of event handlers such that a mouse. Bobby has a very good page with advice about this.

The document W3C Web Content Accessibility Guidelines 1.0 Conformance Logos explains how to verify conformance to these guidelines.

Web Accessibility Validation

Some free online validation tools

Bobby Online Free Portal tests if Web pages have a good accessibility design. It has very good explanations and advice for improving accessibility.

WAVE 3.0 Accessibility Tool has user-friendly explanation for web pages accessibility requirements and features. It is sponsored by PIAT (Pennsylvania's Initiative on Assistive Technology) and powered by WebAIM (Web Accessibility in Mind).

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