<img src="planets.jpg" border="0" usemap="#planetmap" alt="lanets" /><map name="planetmap" id="planetmap"> <area shape="circle" coords="180,139,14" href ="venus.HTML" alt="Venus" /> <area shape="circle" coords="129,161,10" href ="mercur.html" alt="Mercury" /> <area shape="rect" coords="0,0,110,260" href ="sun.html" alt="Sun" /></map>shape="rect" coords="x1,y1,x2,y2" // (x1,y1)=Upper Left, (x2,y2)=Lower Right
即,当shape是矩形时,coords表示矩形左上及右下(x2, y2)的坐标
shape="circle" coords="x,y,r" // (x,y)=Center, r=Radius
即,当shape是圆形时,coords表示圆中心点坐标(x, y)及半径
shape="poly" coords="x1,y1,x2,y2,x3,y3..." // (x1,y1>=First Corner, (x2,y2)=Second Corner, ...
即,当shape是poly多边形时,coords表示多边形所有顶点的坐标(x1,y1),(x2,y2),(x3,y3)... |