13 rules for accessible Web pages

1. Provide text alternates to images.

2. Make meaning independent of color.

3. Identify language changes.

4. Make pages style-sheet independent.

5. Update equivalents for dynamic content.

6. Include redundant text links for server-side image maps.

7. Use client-side image maps when possible.

8. Put row and column headers in data tables.

9. Associate all data cells with header cells.

10. Title all frames.

11. Make the site script independent.

12. Synchronize multimedia equivalents.

13. Provide an option to skip repetitive links.

Source: General Services Administration