Map file or container
Both the container (client-side) and the file (server-side)
for the map look like:
<MAP>
<AREA SHAPE=shape
COORDS=coordinates
HREF=url>
:
</MAP>
Notes:
SHAPE is one of (CIRCLE, RECT, POLY).
CIRCLE center x, center y, radius
RECT upper left x, upper left y,
lowel right x, lower right y
POLY x1, y1, x2, y2, Ö, xn, yn
URL is the destination when clicked