用IMG+map+area,如:
<map name="FPMap0">
<area alt="提示信息" coords="50, 52, 123, 99" shape="rect" href="http://***">
</map><img border="0" src="map.jpg" width="300" height="438" usemap="#FPMap0">
<map name="FPMap0">
<area alt="提示信息" coords="50, 52, 123, 99" shape="rect" href="http://***">
</map><img border="0" src="map.jpg" width="300" height="438" usemap="#FPMap0">
<area title="提示信息1" coords="10, 10, 40, 50" >
<area title="提示信息2" coords="40, 50, 90, 100" >
</map><img border="0" src="1111" usemap="#111">
提示内容应该用title吧动态改变提示:
document.getElementsByTagName("area")[0].setAttribute("title","提示111");
document.getElementsByTagName("area")[1].setAttribute("title","提示111");