<style>
/*样式自己补一下*/
.parent .son{display: none}
</style>
<ul class="parent">
<li class="pli">
<span>php</span>
<ul class="son">
<li>php1</li>
<li>php1</li>
</ul>
</li>
<li class="pli">
<span>php</span>
<ul class="son">
<li>php1</li>
<li>php1</li>
</ul>
</li>
<li class="pli">
<span>php</span>
<ul class="son">
<li>php1</li>
<li>php1</li>
</ul>
</li>
<li class="pli">
<span>php</span>
<ul class="son">
<li>php1</li>
<li>php1</li>
</ul>
</li>
<li class="pli">
<span>php</span>
<ul class="son">
<li>php1</li>
<li>php1</li>
</ul>
</li>
</ul> var pli = document.querySelectorAll(".parent .pli span")
for(var i = 0i<pli.lengthi++){
pli[i].index = i
pli[i].onclick = function(){
for(var j = 0j<pli.lengthj++){
document.querySelectorAll(".parent .pli .son")[j].style.display="none"
}
this.parentNode.querySelector(".son").style.display="block"
}
}
放上去的话，用css的hover，先设置默认隐藏
.name{}display:none} .name:hover > .list{display:block}点击的话，用JQ的click
$(".name").click(function(){if($(".name").is(":hidden"))
$(".name").css("display","block")
else
$(".name").css("display","none")
})
如果需要带点动画效果，你就要看看CSS3了........
为了给导航栏添加响应式特性，您要折叠的内容必须包裹在带有 classes .collapse、.navbar-collapse 的 <div>中。折叠起来的导航栏实际上是一个带有 class .navbar-toggle 及两个 data- 元素的按钮。第一个是 data-toggle，用于告诉 JavaScript 需要对按钮做什么，第二个是 data-target，指示要切换到哪一个元素。三个带有 class .icon-bar 的 <span>创建所谓的汉堡按钮。这些会切换为.nav-collapse <div>中的元素。为了实现以上这些功能，您必须包含 Bootstrap 折叠（Collapse）插件。<!DOCTYPE html>
<html>
<head>
<title>Bootstrap 实例 - 响应式的导航栏</title>
<link href="/bootstrap/css/bootstrap.min.css" rel="stylesheet">
<script src="/scripts/jquery.min.js"></script>
<script src="/bootstrap/js/bootstrap.min.js"></script>
</head>
<body>
<nav class="navbar navbar-default" role="navigation">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse"
data-target="#example-navbar-collapse">
<span class="sr-only">切换导航</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">W3Cschool</a>
</div>
<div class="collapse navbar-collapse" id="example-navbar-collapse">
<ul class="nav navbar-nav">
<li class="active"><a href="#">iOS</a></li>
<li><a href="#">SVN</a></li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown">
Java <b class="caret"></b>
</a>
<ul class="dropdown-menu">
<li><a href="#">jmeter</a></li>
<li><a href="#">EJB</a></li>
<li><a href="#">Jasper Report</a></li>
<li class="divider"></li>
<li><a href="#">分离的链接</a></li>
<li class="divider"></li>
<li><a href="#">另一个分离的链接</a></li>
</ul>
</li>
</ul>
</div>
</nav>
</body>
</html>
重点分析其与默认导航栏的不同之处：
1、在
<div class="navbar-header">
中添加了一个按钮：
<button type="button" class="navbar-toggle" data-toggle="collapse"
data-target="#example-navbar-collapse">
<span class="sr-only">切换导航</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
如上所述，data-toggle用于告诉 JavaScript 需要对按钮做什么， data-target指示要切换到哪一个元素。三个带有 class .icon-bar 的 <span>创建所谓的汉堡按钮。
.navbar-toggle {
position: relative
float: right
padding: 9px 10px
margin-top: 8px
margin-right: 15px
margin-bottom: 8px
background-color: transparent
background-image: none
border: 1px solid transparent
border-radius: 4px
}
.navbar-toggle:focus {
outline: 0
}
.navbar-toggle .icon-bar {
display: block
width: 22px
height: 2px
border-radius: 1px
}
.navbar-toggle .icon-bar + .icon-bar {
margin-top: 4px
}
@media (min-width: 768px) {
.navbar-toggle {
display: none
}
}
.sr-only {
position: absolute
width: 1px
height: 1px
padding: 0
margin: -1px
overflow: hidden
clip: rect(0, 0, 0, 0)
border: 0
}
.sr-only-focusable:active,
.sr-only-focusable:focus {
position: static
width: auto
height: auto
margin: 0
overflow: visible
clip: auto
}
.navbar-toggle .icon-bar {
display: block
width: 22px
height: 2px
border-radius: 1px
}
.navbar-toggle .icon-bar + .icon-bar {
margin-top: 4px
}
.navbar-default .navbar-toggle .icon-bar {
background-color: #888
}
.navbar-inverse .navbar-toggle .icon-bar {
background-color: #fff
}
2、项目列表被包裹在了一个另外增加的<div>中
<div class="collapse navbar-collapse" id="example-navbar-collapse">
.collapse {
display: none
}
.navbar-collapse {
padding-right: 15px
padding-left: 15px
overflow-x: visible
-webkit-overflow-scrolling: touch
border-top: 1px solid transparent
-webkit-box-shadow: inset 0 1px 0 rgba(255, 255, 255, .1)
box-shadow: inset 0 1px 0 rgba(255, 255, 255, .1)
}
@media (min-width: 768px) {
.navbar-collapse {
width: auto
border-top: 0
-webkit-box-shadow: none
box-shadow: none
}
.navbar-collapse.collapse {
display: block !important
height: auto !important
padding-bottom: 0
overflow: visible !important
}
@media (max-width: 480px) and (orientation: landscape) {
.navbar-fixed-top .navbar-collapse,
.navbar-fixed-bottom .navbar-collapse {
max-height: 200px
}
}
