The following code shows how to create Dropdowns via JavaScript.
<!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>
<script type="text/javascript">
$(document).ready(function(){<!--from w w w . ja v a2 s . c o m-->
$(".dropdown-toggle").dropdown();
});
</script>
<style type="text/css">
.bs-example {
margin: 20px;
}
</style>
</head>
<body>
<div class="bs-example">
<div class="dropdown">
<a href="#" class="dropdown-toggle">Dropdown <b class="caret"></b></a>
<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>