HTML area href 属性

带有可点击区域的图像映射：

<img src="planets.gif"
      width="145" height="126"
      alt="Planets"
	usemap="#planetmap">
      <map 
      name="planetmap">
      <area shape="rect" coords="0,0,82,126" href="sun.htm" alt="Sun">
      <area shape="circle" coords="90,58,3" href="mercur.htm" alt="Mercury">
      <area shape="circle" coords="124,58,8" href="venus.htm" alt="Venus">
      </map>