表格（合并单元格）

<style>

td{

　　text-align: center;

}

</style>

<table class="yitable" border="1" width="620" rules="groups" style="background-color:#f5f5f5; margin:0 auto;1128px;" >
<colgroup span="1" width="150"></colgroup>
<colgroup span="1" width="200"></colgroup>
<colgroup span="1" width="200"></colgroup>
<colgroup span="1" width="400"></colgroup>
<thead>
<tr style="height: 45px;">
<td>Serial number</td>
<td colspan="2">Date</td>
<td>Email</td>
<td>lucky ID</td>
</tr>
</thead>
<tbody>
<tr>
<td>1</td>
<td>2016/12/1</td>
<td>8:59:23</td>
<td>nick@......hina.com</td>
<td>18</td>
</tr>
</tbody>

<tbody>
<tr>
<td>13</td>
<td>2016/12/1</td>
<td>14:29:21</td>
<td>ptyp......@gmail.com</td>
<td>20</td>
</tr>
</tbody>

<tbody>
<tr>
<td>15</td>
<td>2016/12/1</td>
<td>14:32:34</td>
<td>spi1......@yahoo.gr</td>
<td>10</td>
</tr>
</tbody>

<tbody>
<tr>
<td rowspan="2">19</td>
<td rowspan="2">2016/12/1</td>
<td rowspan="2">15:02:07</td>
<td rowspan="2">paco......@hotmail.com</td>
<td style="border-bottom: 1px solid #808080">16</td>
</tr>
<tr>
<td>49</td>
</tr>
</tbody>

<tbody>
<tr>
<td>20</td>
<td>2016/12/1</td>
<td>15:12:28</td>
<td>ange......@gmail.com</td>
<td>50</td>
</tr>
</tbody>

<tbody>
<tr>
<td>26</td>
<td>2016/12/1</td>
<td>15:53:59</td>
<td>toti......48@gmail.com</td>
<td>13</td>
</tr>
</tbody>

<tbody>
<tr>
<td rowspan="5">27</td>
<td rowspan="5">2016/12/1</td>
<td rowspan="5">15:54:29</td>
<td rowspan="5">katz......@gmx.net</td>
<td style="border-bottom: 1px solid #808080">02</td>
</tr>
<tr>
<td style="border-bottom: 1px solid #808080">22</td>
</tr>
<tr>
<td style="border-bottom: 1px solid #808080">36</td>
</tr>
<tr>
<td style="border-bottom: 1px solid #808080">62</td>
</tr>
<tr>
<td>90</td>
</tr>
</tbody>

</table>