表格内容多级排列, 如何实现？

Answer 1

设置单元格 (td) 的 colspan 或 rowspan 属性.

示例

        <table border="3">
            <tr>
                <td colspan="2">A1</td>
                <td>A3</td>
            </tr>
            <tr>
                <td>B1</td>
                <td>B2</td>
                <td>B3</td>
            </tr>
            <tr>
                <td rowspan="2">C1</td>
                <td>C2</td>
                <td>C3</td>
            </tr>
            <tr>
                <td>D2</td>
                <td>D3</td>
            </tr>
        </table>