easyui-datagrid列自适应的代码

<thead >
        <tr >
            <th width="15%" data-options="field:'itemNo',width:140,align:'center'">商品编号</th>
                <th width="15%" data-options="field:'itemName',width:140,align:'center'">商品名称</th>
                <th width="15%" data-options="field:'productType',width:140,align:'center'">商品类别</th>
                <th width="15%" data-options="field:'Outbound quantity',width:140,align:'center'">出库数量</th>
                <th width="15%" data-options="field:'applicant',width:140,align:'center'">申请人</th>
                <th width="25%" data-options="field:'remark',width:350,align:'center'">备注</th>
          @* , formatter:EditDelete*@
        </tr>
    </thead>