abstract：<!DOCTYPE html><html><head> <title>三級下拉導(dǎo)航</title> <script type="text/javascript" src="jquery-3.3.1.js"></script> <style type="text
<!DOCTYPE html>
<html>
<head>
<title>三級下拉導(dǎo)航</title>
<script type="text/javascript" src="jquery-3.3.1.js"></script>
<style type="text/css">
ul li{
list-style:none;
}
ul li{width: 100px;height: 35px;text-align: center;float:left;border-right:1px solid #ccc;cursor:pointer;}
.twobox li{width: 100px;height: 30px;line-height: 30px;background: #2D2D2D;color:#A9A9A9;font-size:14px;position:relative;border: 0px;left:-40px;}
.twobox li:hover{background:#000;color:#fff;}
.three{position: absolute;top:0px;left:100px;}
.three li{width: 99px;height: 30px;border: 0;}
</style>
</head>
<body>
<script type="text/javascript">
$(document).ready(function(){
$(".twobox").hide()
$('.three').hide()
$('.xiala').mouseover(function(){
$('.twobox').slideDown()
})
$('.two').mouseover(function(){
$('.three').slideDown()
$('.xiala').mouseleave(function(){
$('.twobox').slideUp()
})
$('.two').mouseleave(function(){
$('.three').slideUp()
})
})
})
</script>
<div class="menu">
<ul class="one"><!--一級下拉菜單-->
<li>首頁</li>
<li class="xiala">產(chǎn)品
<ul class="twobox"><!--二級下拉菜單-->
<li>產(chǎn)品1</li>
<li class="two">產(chǎn)品2
<ul class="three">
<li>產(chǎn)品2.1</li>
<li>產(chǎn)品2.2</li>
<li>產(chǎn)品2.3</li>
<li>產(chǎn)品2.4</li>
</ul>
</li>
<li class="">產(chǎn)品3
</li>
<li>產(chǎn)品4</li>
<li>產(chǎn)品5</li>
<li>產(chǎn)品6</li>
</ul>
</li>
<li>公司新聞</li>
<li>行業(yè)新聞</li>
<li>聯(lián)系我們</li>
</ul>
</div>
</body>
</html>
Correcting teacher：滅絕師太Correction time：2018-11-20 12:33:56
Teacher's summary：find有find好處，比較精確，你的寫法，如果我在后面多加幾個二級菜單，就不能用了