Easyui使用Dialog行内按钮布局

<div class="easyui-layout" data-options="fit:true">
<div data-options="region:'north',split:false"
style="padding: 0px; width: 100%; height: 100%; display: table; text-align: center;">
<div title="角色分配" style="padding: 2px; display: table-cell;">
<table cellpadding="12" cellspacing="0" style="width: 100%; height: 10%;">
<tr>
<td style="text-align: right;">角色名称:</td>
<td><input id="roleName"  class="easyui-textbox"
style="width: 180px"></td>
<td style="text-align: right;">角色功能:</td>
<td>
<select id="roleFun" class="easyui-combobox" data-options="editable:false,multiple:true,panelHeight:'400px'" style="width:180px"></select>
<div id="roleFunPanel">
<ul id="roleFunTree" class="easyui-tree" data-options="animate: true,checkbox:true">
<li>线路列表1</li>
<li>线路列表2</li>
<li>线路列表3</li>
</ul>
</div>
</td>
<td style="text-align:center;">
<a href="javascript:void(0)" class="easyui-linkbutton" data-options="iconCls:'icon-add',plain:true" onclick="newAppendRole()">添加</a>
</td>
</tr>
</table>
<table id="tblRoleDetail" ></table>
</div>
</div>
</div>
<div id="editRoleDialogFrame"></div>

var grid = $("#tblRoleDetail").datagrid({
border : false,
striped : true,
rownumbers : true,
fitColumns : true,
singleSelect : true,
height: '90%',
width: '100%',
idField :'roleName',
plain : true,
fit : false,
selectOnCheck:false,
nowrap: true,
onClickRow : tblRoleDetailOnClickRow ,
columns:[[
{field:'roleName',title:'角色名',width: '19%',align:'center'},
{field:'funId',title:'权限名称',width: '70%',align:'left',
formatter: function(value,row,index){
return '<span title='+value+'>'+value+'</span>'
}
},
{field:'opt',title:'操作',width:'10%',align:'center',
formatter:function(value,rec)
{
var btn1 = '<a class="editcls" onclick="newRoleEdit(\''+rec.roleName+'\')" href="javascript:void(0)">编辑</a>';
var btn2 = '<a class="delecls" onclick="removeRole(\''+rec.roleName+'\')" href="javascript:void(0)">删除</a>';
return btn1+btn2;
}
}
]],
onLoadSuccess:function(data){
$('.editcls').linkbutton({text:'编辑',plain:true,iconCls:'icon-edit'});
$('.delecls').linkbutton({text:'删除',plain:true,iconCls:'icon-remove'});
$('#tblRoleDetail').datagrid('fixRowHeight');   //固定所有高度，避免行号和行数据错位
}
});