The following code shows how to create mini button group.
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
src='http://code.jquery.com/jquery-1.9.1.js'></script>
<script type='text/javascript'
src="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" type="text/css"
href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-combined.min.css">
<style type='text/css'>
.mark_selector_button {<!--from w w w. java 2 s .c o m-->
width: 80px;
}
</style>
<script type='text/javascript'>//<![CDATA[
$(window).load(function(){
$('.mark_selector_button').click(function() {
if ($(this).hasClass('active')) {
$(this).removeClass('btn');
}
});
});//]]>
</script>
</head>
<body>
<div class="btn-group btn-group-vertical mark_selector"
data-toggle="buttons-radio">
<button class="btn btn-mini mark_selector_button">Species</button>
<button class="btn btn-mini mark_selector_button">Unit</button>
<button class="btn btn-mini mark_selector_button">Data</button>
</div>
</body>
</html>