<table id="tb">
<tr>
<th>姓名</th>
<th>年龄</th>
<th>性别</th>
</tr>
<tr>
<td>小王</td>
<td>20</td>
<td>男</td>
</tr>
<tr class="alt">
<td>小王</td>
<td>20</td>
<td>男</td>
</tr>
<tr>
<td>小王</td>
<td>20</td>
<td>男</td>
</tr>
<tr class="alt">
<td>小王</td>
<td>20</td>
<td>男</td>
</tr>
</table>
#tb{
border-collapse: collapse;
width: 500px;
}
#tb td,#tb th{
border: 1px solid bisque;
padding: 5px;
}
#tb th{
text-align: left;
background-color: aqua;
color: #ffffff;
}
#tb tr.alt td{
color: black;
background-color: aquamarine;
}
