Detailed explanation of the use of tag in html
html中
如需对全部列应用样式，
您只能在 table 或 colgroup 元素中使用
col 元素为表格中的三个列规定了不同的对齐方式：
<table width="100%" border="1"> <col align="left" />
<col align="left" />
<col align="right" />
<tr>
<th>ISBN</th>
<th>Title</th>
<th>Price</th>
</tr>
<tr>
<td>3476896</td>
<td>My first HTML</td>
<td>$53</td>
</tr>
</table>哪些浏览器支持
所有主流浏览器都支持
html中col标签的实例
<html> <body> <table border="2"> <col span="2" style="color:red"> <col style="color:blue"> <tr> <td>红色</td> <td>红色</td> <td>蓝色</td> </tr> <tr> <td>红色</td> <td>红色</td> <td>蓝色</td> </tr> </table> </body> </html>
这样就可以给每一列设置样式，而不用在每个td里面设置。
第一二两列是红的。第三列是蓝的。
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