Access: [7.1.1.5]: remove flicker (animated gif)
(Priority 1)

Cause:

Ensure that animated gifs do not flicker. On-screen flickering can trigger epileptic seizures in people with photosensitive epilepsy. At present, browsers do not allow screen flickering to be disabled by the user.

Testfile:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"
	"http://www.w3.org/TR/REC-html40/loose.dtd">
<html lang="en">
<head>
<title>aert1.0/7.1.1</title>
</head>
<body>

<img src="flicker.gif"/>

</body>
</html>

References:

W3C WAI: http://www.w3.org/WAI//
HTML Techniques for WAI 1.0: http://www.w3.org/TR/WCAG10-HTML-TECHS/