datagrid上面的查询按钮设置了，但是分页工具栏不显示

原因：查询的linkbutton没有放在toolbar里。

 <script type="text/javascript">
     $(function(){
          $('#dg').datagrid({
              url:'ContactServlet',
              toolbar:'#tb',
              fit:true,
              fitColumns:true,
              rownumbers:true,
              pagination:true,
              idField : 'id',
              columns:[[
                        {field:'id',title:'id',checkbox:true},
                        {field:'lxr_xm',title:'姓名',width:220,align:'center'},
                        {field:'lxr_tel',title:'电话',width:220,align:'center'},
                        {field:'lxr_email',title:'Email',width:220,align:'center'},
                        {field:'lxr_qq',title:'QQ',width:220,align:'center'},
                        {field:'lxr_lx',title:'联系',width:220,align:'center'}
                    ]]
          });

     });
 </script>
 </head>
 <body>
 <table id="dg" title="通讯录"></table>
 <div id="tb" style="height: auto;display: none;" >
         <a href="javascript:openUserAddDialog()" class="easyui-linkbutton" iconCls="icon-search" plain="true">查询</a>
         <a href="javascript:openUserAddDialog()" class="easyui-linkbutton" iconCls="icon-add" plain="true">添加</a>
         <a href="javascript:openUserModifyDialog()" class="easyui-linkbutton" iconCls="icon-edit" plain="true">修改</a>
         <a href="javascript:deleteUser()" class="easyui-linkbutton" iconCls="icon-remove" plain="true">删除</a>
 </div>
 </body>
 </html>