coords: The position and shape of an image map element on the screen.
Content: Numerical coordinates in length
rectangle: left-x,top-y,right-x,bottom-y
circle: center-x,center-y,radius
polygon: x1,y1,x2,y2,...,xN,yN
rectangle: left-x,top-y,right-x,bottom-y
circle: center-x,center-y,radius
polygon: x1,y1,x2,y2,...,xN,yN
Default: Not required
Deprecated in XHTML 1.0: No
DTD: XHTML 1.0 Standard
