同样是2种方式
参考http://www.bootcss.com/javascript.html#dropdowns
JS方式调用 http://www.w3resource.com/twitter-bootstrap/dropdown.php
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" /> <link href="../css/bootstrap.css" rel="stylesheet">
<style type="text/css"> </style>
<script src="../js/jquery-1.8.0.min.js" type="text/javascript"></script>
<script src="../js/bootstrap.js" type="text/javascript"></script> </head> <body>
<div class="dropdown">
<!-- 加上data-toggle就使href的链接失效 -->
<a class="dropdown-toggle" id="dLabel" role="button" data-toggle="dropdown" data-target="#" href="page.html"> Dropdown <b class="caret"></b> </a>
<ul class="dropdown-menu" role="menu" aria-labelledby="dLabel">
...
</ul>
</div> <div style="margin:50px"></div>
导航条中的下拉菜单
<div id="navbar" class="navbar navbar-static">
<div class="navbar-inner">
<div class="container" style="width: auto;">
<a class="brand" href="#">Project Name</a><!-- 位于左侧的站标 -->
<ul class="nav" role="navigation">
<!-- ul是导航中的菜单集合 -->
<li class="dropdown">
<!-- 一个栏目的开始 -->
<a id="drop1" href="page.html" role="button" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a><!-- 改栏目的链接 增加data-toggle="dropdown" 属性就是下拉菜单 -->
<!-- class="caret" 是表示下拉菜单的倒三角-->
<ul class="dropdown-menu" role="menu" aria-labelledby="drop1">
<li role="presentation">
<a role="menuitem" tabindex="-1" href="http://google.com">Action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#anotherAction">Another action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Something else here</a>
</li>
<li role="presentation" class="divider"></li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Separated link</a>
</li>
</ul>
</li>
<li class="dropdown">
<a href="#" id="drop2" role="button" class="dropdown-toggle" data-toggle="dropdown">Dropdown 2<b class="caret"></b></a>
<ul class="dropdown-menu" role="menu" aria-labelledby="drop2">
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Another action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Something else here</a>
</li>
<li role="presentation" class="divider"></li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Separated link</a>
</li>
</ul>
</li>
</ul>
<ul class="nav pull-right">
<li>
<a href="rich.html" id="X" role="button" class="" >Menu1</a>
</li>
<li id="fat-menu" class="dropdown">
<a href="#" id="drop3" role="button" class="dropdown-toggle" data-toggle="dropdown">Dropdown 3 <b class="caret"></b></a>
<ul class="dropdown-menu" role="menu" aria-labelledby="drop3">
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Another action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Something else here</a>
</li>
<li role="presentation" class="divider"></li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Separated link</a>
</li>
</ul>
</li>
</ul>
</div>
</div>
</div>
<button id="btn1" class="btn" >
toogle
</button>
<p></p>
<p></p>
<p></p>
<p></p>
标签页中的下拉菜单
<div id="tab" class="bs-docs-example">
<ul class="nav nav-pills">
<!-- active 表示默认选中 -->
<li class="active">
<a href="#">Regular link</a>
</li>
<li class="dropdown">
<a class="dropdown-toggle" id="drop4" role="button" data-toggle="dropdown" href="#">Dropdown <b class="caret"></b></a>
<ul id="menu1" class="dropdown-menu" role="menu" aria-labelledby="drop4">
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Another action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Something else here</a>
</li>
<li role="presentation" class="divider"></li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Separated link</a>
</li>
</ul>
</li>
<li class="dropdown">
<a class="dropdown-toggle" id="drop5" role="button" data-toggle="dropdown" href="#">Dropdown 2 <b class="caret"></b></a>
<ul id="menu2" class="dropdown-menu" role="menu" aria-labelledby="drop5">
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Another action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Something else here</a>
</li>
<li role="presentation" class="divider"></li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Separated link</a>
</li>
</ul>
</li>
<li class="dropdown">
<a class="dropdown-toggle" id="drop6" role="button" data-toggle="dropdown" href="#">Dropdown 3 <b class="caret"></b></a>
<ul id="menu3" class="dropdown-menu" role="menu" aria-labelledby="drop5" style="margin-top:-5px;">
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Another action</a>
</li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Something else here</a>
</li>
<li role="presentation" class="divider"></li>
<li role="presentation">
<a role="menuitem" tabindex="-1" href="#">Separated link</a>
</li>
</ul>
</li>
</ul>
<!-- /tabs -->
</div> JS方式
<div id="byJS" class="bs-docs-example">
<ul class="nav nav-pills">
<!-- active 表示默认选中 -->
<li class="active">
<a href="#">Regular link</a>
</li>
<li class="dropdown" id="accountmenu">
<a class="dropdown-toggle" data-toggle="dropdown" href="#">Tutorials<b class="caret"></b></a>
<ul class="dropdown-menu">
<li><a href="#">PHP</a></li>
<li><a href="#">MySQL</a></li>
<li class="divider"></li>
<li><a href="#">JavaScript</a></li>
<li><a href="#">HTML5</a></li>
</ul>
</li>
</ul>
<!-- /tabs -->
</div> <script type="text/javascript">
$(function() {
$('#btn1').click(function() {
$('#byJS .dropdown-toggle').dropdown();
});
$("#navbar .dropdown").hover(
function(){
$(this).addClass("open");
},
function(){
$(this).removeClass("open");
}
);
$("#tab .dropdown").hover(
function(){
$(this).find('.dropdown-menu').show('fast');
},
function(){
$(this).find('.dropdown-menu').hide('fast');
}
);
});
</script> </body>
</html>