官网：http://tablesorter.com/docs/
下载相应的js文件：
http://jquery.com/
https://github.com/christianbach/tablesorter
demo：
<html>
<head>
<script type="text/javascript" src="jquery-3.2.1.min.js"></script>
<script type="text/javascript" src="jquery.tablesorter.js"></script>
<script>
$(document).ready(function()
{
$("#myTable").tablesorter();
}
);
</script>
</head>
<table border='1' id="myTable">
<thead>
<tr>
<th rowspan="3" style="text-align:center;">公司</th>
<th colspan="4" style="text-align:center;">一月</th>
<th colspan="4" style="text-align:center;">二月</th>
</tr>
<tr>
<th colspan="2" style="text-align:center;">时均值</th>
<th colspan="2" style="text-align:center;">日均值</th>
<th colspan="2" style="text-align:center;">时均值</th>
<th colspan="2" style="text-align:center;">日均值</th>
</tr>
<tr>
<th style="text-align:center;">废水</th>
<th style="text-align:center;">废气</th>
<th style="text-align:center;">废水</th>
<th style="text-align:center;">废气</th>
<th style="text-align:center;">废水</th>
<th style="text-align:center;">废气</th>
<th style="text-align:center;">废水</th>
<th style="text-align:center;">废气</th>
</tr>
</thead>
<tr>
<td class="company_td">河南省豫鹤同力水泥有限公司</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">1</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">2</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">3</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">4</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">5</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">6</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">7</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">8</td>
<tr>
<tr>
<td class="company_td">河南省豫鹤同力水泥</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">13</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">23</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">34</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">45</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">55</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">6</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">7</td>
<td style="text-decoration: underline; color: rgb(0, 0, 255);">82</td>
<tr>
</table>
</html>