If you use movement, use the following technique to meet Checkpoint 13 from the IBM Web Accessibility Checklist . Use style sheets to create movement. By using style sheets with scripting to create movement, you can give the user the ability to turn off the movement by turning off the style sheets. Recommended techniques to enhance accessibility. Minimize the area of the screen which is flashing.
Smaller areas are less likely to cause seizures.
Avoid flashing which has a high level of contrast between the states. Some individuals are more susceptible to high intensity flashing. Testing for blinking, moving or flickering content. After a Web site or template has been created, check the site to ensure that it complies with accessibility requirements. Several techniques are available to verify that the content on your Web pages is accessible to people with disabilities.