Image map

• Client-side image map (usemap attribute): image divided into clickable or neutral areas (nohref attribute);
• Server-side image map (ismap attribute): image for which the browser transmits the coordinates of the pointer to the server, each set of coordinates corresponding to a resource (web page). Server-side image maps are extremely rare.

Note: in HTML5, the ismap attribute is obsolete and non-compliant for image type buttons (input type="image").