求助
求助大侠怎么使用图像映射？！！
程序代码：<img src="images/logo.jpg" width="300" height="119" border="0" usemap="#Map"> <map name="Map"> <area shape="rect" coords="20,4,129,75" href="#" alt="111"> <area shape="circle" coords="169,35,32" href="#" alt="222"> <area shape="poly" coords="261,58,278,65,279,88,266,93,251,94,243,68" href="#" alt="333"> </map>