Client-side image maps shall be provided instead of server-side image maps except where the regions cannot be defined with an available geometric shape.

Why this is important: Image maps are designed for fully-sighted readers who can also use a mouse. Each clickable area must be identified with its link target, and must be reachable via its tab order, just like all other links. Frequently, an alternate means of selection may prove easiest to use for all visitors. (Example: a drop-down list of states in addition to an image map of the country.)