Reference: http://www.w3schools.com/tags/tag_map.asp
<img src ="planets.gif" width ="145"
height ="126" alt="Planets" usemap
="#planetmap" />
<map id ="planetmap" name="planetmap">
<area shape ="rect" coords
="0,0,82,126" href ="sun.htm" target
="_blank" alt="Sun" />
<area shape ="circle" coords
="90,58,3" href ="mercur.htm" target
="_blank" alt="Mercury" />
<area shape ="circle" coords
="124,58,8" href ="venus.htm" target
="_blank" alt="Venus" />
</map>