The following code shows how to create Dropdowns within Split Buttons.
<!DOCTYPE html>
<html lang="en">
<head>
<link rel="stylesheet"
href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap.min.css">
<link rel="stylesheet"
href="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/css/bootstrap-theme.min.css">
<script type="text/javascript"
src="http://code.jquery.com/jquery.min.js"></script>
<script
src="http://netdna.bootstrapcdn.com/bootstrap/3.0.3/js/bootstrap.min.js"></script>
<style type="text/css">
.btn-toolbar {<!--from w w w. j a va2 s.com-->
margin: 20px;
}
</style>
</head>
<body>
<div class="btn-toolbar">
<!--Default buttons with dropdown menu-->
<div class="btn-group">
<button class="btn btn-default">Action</button>
<button data-toggle="dropdown"
class="btn btn-default dropdown-toggle">
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</div>
<!--Primary buttons with dropdown menu-->
<div class="btn-group">
<button class="btn btn-primary">Action</button>
<button data-toggle="dropdown"
class="btn btn-primary dropdown-toggle">
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</div>
<!--Info buttons with dropdown menu-->
<div class="btn-group">
<button class="btn btn-info">Info</button>
<button data-toggle="dropdown" class="btn btn-info dropdown-toggle">
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</div>
<!--Success buttons with dropdown menu-->
<div class="btn-group">
<button class="btn btn-success">Success</button>
<button data-toggle="dropdown"
class="btn btn-success dropdown-toggle">
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</div>
<!--Warning buttons with dropdown menu-->
<div class="btn-group">
<button class="btn btn-warning">Warning</button>
<button data-toggle="dropdown"
class="btn btn-warning dropdown-toggle">
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</div>
<!--Danger buttons with dropdown menu-->
<div class="btn-group">
<button class="btn btn-danger">Danger</button>
<button data-toggle="dropdown" class="btn btn-danger dropdown-toggle">
<span class="caret"></span>
</button>
<ul class="dropdown-menu">
<li><a href="#">Action</a></li>
<li><a href="#">Another action</a></li>
<li class="divider"></li>
<li><a href="#">Separated link</a></li>
</ul>
</div>
</div>
</body>
</html>