<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
<style>
.contain li{
width: 100px;
height: 20px;
float: left;
background: blue;
list-style:none;
border-right: 1px solid white;
}
.active{
background: red;
}
li.active2{
background: red;
}
</style>
</head>
<body>
<ul class="contain">
<li></li>
<li class="active"></li>
<li class="active2"></li>
</ul>
</body>
</html>
active想改变颜色，却没有起效果，只有li.active2才有效果。
时间： 2024-11-21 02:01:01