<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>引入jQuery库</title>
<script type="text/javascript" language="javascript" src="jquery-3.2.1.js"></script>
<script>
$(document).ready(function(){
$("tr:odd").addClass("odd");
$("tr:even").addClass("even")
})
</script>
<style type="text/css">
.odd{
background-color: red;
}
.even{
background-color: blue;
}
</style>
</head>
<body>
<table border="1">
<tr><td>学号</td><td>姓名</td><td>班级</td></tr>
<tr><td>2015180001</td><td>张三</td><td>15信管本科班</td></tr>
<tr><td>2015181001</td><td>李四</td><td>16信管本科班</td></tr>
</table>
</body>
</html>
