All images -- including transparent gifs -- must have "alt" text. Alternate text should be concise (i.e. 10-12 words maximum). For transparent images and spacers, use alt="" (NULL), alt="" (spaces are acceptable), or alt="blank". Any words depicted in the image should also appear in the "alt" text description.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html lang="en"> <head> <title>aert1.0/1.1.1</title> </head> <body> <img src="noAlt.jpg"> </body> </html>
W3C WAI: http://www.w3.org/WAI//
HTML Techniques for WAI 1.0: http://www.w3.org/TR/WCAG10-HTML-TECHS/