The difference between get and post: https://blog.csdn.net/qq_44721831/article/details/98471707
<body>
<form action="" method="get">
<table border="1" width="80%">
<tr>
行开始标记
<td colspan="5">列开始标记colspan跨五列
</td>
<td rowspan="5">列开始标记rowspan跨两行
</td>
</tr>
</table>
</form>
</body>
