使用border-collapse:collapse;属性新建一个细线表格

<style type="text/css">
.table{border:1px #000 solid;border-collapse:collapse;}
.table tr td{border:1px #000 dotted;}
</style>
<table class="table" width="750" cellspacing="0">
<tr>
<td width="80">1</td>
<td>2</td>
<td>3</td>
<td>4</td>
</tr>
<tr >
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
</tr>
<tr>
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
</tr>
<tr>
<td>1</td>
<td>2</td>
<td>3</td>
<td>4</td>
</tr>
</table>