在百度地图上获得坐标范围的“银行”

代码：
 1     <style type="text/css">
 2     #allMap{
 3      400px;
 4       height:400px;
 5       overflow:hidden;
 6     }
 7     </style>
 8 </head>
 9 <body>
10     <form id="form1" runat="server">
11         <div id="allMap" style=" float:left;">
12         </div>
13     </form>
14 
15     <script src="http://api.map.baidu.com/api?v=1.3" type="text/javascript"></script>
16 
17      <script language="javascript" type="text/javascript">
18     var map = new BMap.Map("allMap");
19     var point = new BMap.Point(121.568004,31.218032);
20     map.centerAndZoom(point,16);   
21     map.enableScrollWheelZoom();
22     var local = new BMap.LocalSearch(map,{renderOptions:{map:map}});
23     local.searchInBounds("银行",map.getBounds());
24     </script>
25 </body>