abstract：<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewp
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>三级下拉菜单</title>
<script src="jquery.js"></script>
<style>
*{margin: 0;
padding: 0;
}
.cd{
width: 800px;
height: 30px;
background-color: #00CC66;
margin: 0 auto;
}
ul {
list-style: none;
}
ul li{
width: 100px;
height: 30px;
line-height: 30px;
float: left;
cursor: pointer;
border-right: 1px solid #ccc;
text-align: center;
}
.tou li{
line-height: 30px;
color: #000000;
}
.two li {
width: 100px;
height: 30px;
line-height: 30px;
position: relative;
background-color: #00a0e9;
text-align: center;
}
.thr{
position: absolute;
top: 0;
left: 100px;
}
</style>
</head>
<body>
<div>
<ul>
<li>首页</li>
<li>在线咨询
<ul>
<li>qq客服
<ul>
<li>4305555</li>
<li>4305555</li>
<li>4305555</li>
<li>4305555</li>
</ul>
</li>
<li>微信客服</li>
<li>淘宝客服</li>
</ul>
</li>
<li>关于我们</li>
<li>反馈</li>
</ul>
</div>
<script>
$(document).ready(function () {
//隐藏菜单
$('.two').hide();
$('.thr').hide();
//选中对应的li,你选择的是最外边div，逻辑就错了
$('.tou>li').mouseover(function () {
$('.zxzx').css('color','red'); //选中变色
$(this).find('.two').slideDown(1000)
});
$('.tou>li').mouseleave(function () {
$('.zxzx').css('color','#000000');
$(this).find('.two').hide();
});
$('.two>li').mouseover(function () {
// alert("11");
$(this).find('.thr').slideDown(1000);
});
$('.two>li').mouseleave(function () {
/*alert("111");*/
$(this).find('.thr').slideUp(500);
});
})
</script>
</body>
</html>此代码 有两个问题：
class名取的太不行了，除了你自己看，别人看会找的眼睛疼啊，取名字最好知名知意
代码逻辑不清晰，建议：注释上备注
Correcting teacher：灭绝师太Correction time：2018-11-20 09:31:00
Teacher's summary：第一个问题：this指代当前对象
问题改在你的源码中，你看看……不理解在私聊我