Always include alternative text for each area in the image map and should not place an ISMAP attribute in an INPUT element or an IMG element.


<img src="welcome.gif" usemap="#map1"
alt="Areas in the library. Select an area for
more information on that area." />
<map id="map1" name="map1">
<area shape="rect" coords="0,0,30,30"
href="reference.html" alt="Reference" />
<area shape="rect" coords="34,34,100,100"
href="media.html" alt="Audio visual lab" />


This example uses the alt attribute of the area element to provide text that describes the purpose of the image map areas. - (http://www.w3.org/TR/WCAG20-TECHS/H24.html)