1.
border-collapse 属性设置是否将表格边框折叠为单一边框：
table
{
border-collapse:collapse;
}
如果没有规定 !DOCTYPE，border-collapse 属性可能会引起意想不到的错误。
2.制作一个漂亮的表格
<html>
<head>
<style type="text/css">
#customers
{
font-family:"Trebuchet MS", Arial, Helvetica, sans-serif;
width:100%;
border-collapse:collapse;
} #customers td, #customers th
{
font-size:1em;
border:1px solid #98bf21;
padding:3px 7px 2px 7px;
} #customers th
{
font-size:1.1em;
text-align:left;
padding-top:5px;
padding-bottom:4px;
background-color:#A7C942;
color:#ffffff;
} #customers tr.alt td
{
color:#000000;
background-color:#EAF2D3;
}
</style>
</head> <body>
<table id="customers">
<tr>
<th>Company</th>
<th>Contact</th>
<th>Country</th>
</tr> <tr>
<td>Apple</td>
<td>Steven Jobs</td>
<td>USA</td>
</tr> <tr class="alt">
<td>Baidu</td>
<td>Li YanHong</td>
<td>China</td>
</tr> <tr>
<td>Google</td>
<td>Larry Page</td>
<td>USA</td>
</tr> <tr class="alt">
<td>Lenovo</td>
<td>Liu Chuanzhi</td>
<td>China</td>
</tr> <tr>
<td>Microsoft</td>
<td>Bill Gates</td>
<td>USA</td>
</tr> <tr class="alt">
<td>Nokia</td>
<td>Stephen Elop</td>
<td>Finland</td>
</tr> </table>
</body>
</html>