html里的map标签怎么用

<map>常用在为图像的某区域添加超链接！

用法如下：

<img src ="planets.gif" alt="无法显示此图像" usemap ="#planetmap" />

<map id ="planetmap" 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>

usemap属性获取<map>标签信息，<area> 标签定义一个链接区域，shape属性定义区域形状，coords属性定义链接区域的起点坐标和终点坐标，又不懂的可以hi我！