如何使用Map.让图片的指定部位连接到指定路径

 <tr>
          <td align="right" valign="top"><img src="images/title1_1.gif" width="163" height="42" border="0" usemap="#Map"> </td>
        </tr>
        <tr>
          <td align="right"><img src="images/title2_2.gif" width="163" height="42" border="0" usemap="#Map2"></td>
        </tr>
        <tr>
          <td align="right"><img src="images/title3_1.gif" width="163" height="42" border="0" usemap="#Map3"></td>
        </tr>
        <tr>
          <td align="right"><img src="images/title4_1.gif" width="163" height="42" border="0" usemap="#Map5"> </td>
        </tr>
        <tr>
          <td align="right"><img src="images/title5_1.gif" width="163" height="43" border="0" usemap="#Map4"></td>
        </tr>
        <tr>
          <td height="40" align="right" valign="bottom"><a href="zt_zdxm.jsp"><img src="images/back.gif" width="163" height="30" border="0"></a></td>
        </tr>
      </table>
      <map name="Map">
        <area shape="rect" coords="58,20,158,39" href="jgdt.jsp">
      </map>
      <map name="Map2">
        <area shape="rect" coords="58,21,157,39" href="list.jsp">
      </map>
      <map name="Map3">
        <area shape="rect" coords="59,21,122,39" href="jxcp.jsp">
      </map>
      <map name="Map4">
        <area shape="rect" coords="57,21,105,38" href="/zdsx/listMsgboard.do">
      </map>
      <map name="Map5">
        <area shape="rect" coords="58,21,122,39" href="bszn.htm">
      </map></td>