Table样式

  .tb_org th {
            background-color: #808080;
            color: #ffffff;
        }

        .tb_org {
            border-right: 1px solid silver;
            border-bottom: 1px solid silver;
            border-collapse: collapse;
             440px;
            overflow-x: auto;
           text-align:center;

        }

            .tb_org thead td {
                border-right: 1px solid;
                text-align: center;
                background-color: #70c3d5;
                color: #ffffff;
            }

            .tb_org tr:hover {
                background-color: #f2eeee;
            }

            .tb_org tbody td {
                border-left: 1px solid silver;
                border-top: 1px solid silver;
            }

 <fieldset style="overflow-y:auto;">
                <table id="tb_org" class="tb_org">
                    <thead>
                        <tr><th>机构名称</th><th>预算金额</th></tr>
                    </thead>
                    <tbody></tbody>
                </table>
            </fieldset>