Checkpoint 4.13 - Mobile-PDA

Image maps present a usable, visual representation of information on the screen that allows user interaction. This assumes in the mobile environment that the device can support the image involved and that the user has a means of navigating the map.

Image maps that are processed on the server take screen coordinates sent from the browser device to determine which location on the map has been clicked. Mobile devices usually have up, down, left and right movement capabilities but not all have mouse-like pointing devices, so cannot participate in sending screen coordinates to the server.

Requirement

There are no server-side image maps

Recommendation

If the size of the image map is an issue, break the image into smaller images and deal with them separately.

The image map must have an alt attribute and all image map hotspots must have an alt attribute that indicates the target of the hotspot.

Checking Tool

Send a request to the site with a device that does not support client-side image maps and check the <map> element is not present.

Information Source

The original source of this information is located on the W3C web site  (www.w3.org/TR/WCAG10-TECHS/#tech-client-side-maps)