Bootstrap下拉菜单，常用在开发项目中，今天为大家介绍介绍

dropdown、dropdown-menu、dropdown-header、divider、dropdown-submenu 例子见下拉菜单.html

<div class="jb51code">
<pre class="brush:css;">
//源码
.dropup,.dropdown {
position: relative;
}
.dropdown-toggle:focus {
outline: 0;
}
.dropdown-menu {
position: absolute;
top: 100%;
left: 0;
z-index: 1000;
display: none;
float: left;
min-width: 160px;
padding: 5px 0;
margin: 2px 0 0;
font-size: 14px;
text-align: left;
list-style: none;
background-color: #fff;
-webkit-background-clip: padding-Box;
background-clip: padding-Box;
border: 1px solid #ccc;
border: 1px solid rgba(0,.15);
border-radius: 4px;
-webkit-Box-shadow: 0 6px 12px rgba(0,.175);
Box-shadow: 0 6px 12px rgba(0,.175);
}
.dropdown-menu.pull-right {
right: 0;
left: auto;
}
.dropdown-menu .divider {
height: 1px;
margin: 9px 0;
overflow: hidden;
background-color: #e5e5e5;
}
.dropdown-header {
display: block;
padding: 3px 20px;
font-size: 12px;
line-height: 1.42857143;
color: #777;
white-space: nowrap;
}