在线运行代码 - 菜鸟教程

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("tr:even").css("background-color","yellow");
});
</script>
</head>
<body>

<h1>欢迎访问我的主页</h1>

<table border="1">
<tr>
  <th>网站名</th>
  <th>网址</th>
</tr>
<tr>
<td>Google</td>
<td>http://www.google.com</td>
</tr>
<tr>
<td>Baidu</td>
<td>http://www.baidu.com</td>
</tr>
<tr>
<td>菜鸟教程</td>
<td>https://www.cainiaoplay.com</td>
</tr>
<tr>
<td>淘宝</td>
<td>http://www.taobao.com</td>
</tr>
<tr>
<td>Facebook</td>
<td>http://www.facebook.com</td>
</tr>
</table>

</body>
</html>
源代码

动行结果
