效果对比图
普通table 标签
<table border="1">
<tr>
<th>Month</th>
<th>Savings</th>
</tr>
<tr>
<td>January</td>
<td>$100</td>
</tr>
</table>
加了css限制的
<table>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
<tr>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
<td>1</td>
</tr>
</table>
table{
border-collapse:collapse;
border-spacing:0;
border-left:1px solid #888;
border-top:1px solid #888;
}
th,td{
border-right:1px solid #888;
border-bottom:1px solid #888;
padding:5px 15px;
}
th{
font-weight:bold;
}