The following code shows how to toggle div block by button.
<!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">
<script type='text/javascript'>
$(function(){<!-- w ww . j a v a 2 s . c om-->
$('button').click(function(){
$(this).text(function(i,old){
return old=='+' ? '-' : '+';
});
});
});
</script>
</head>
<body>
<div class="row-fluid summary">
<div class="span11">
<h2>MyHeading</h2>
</div>
<div class="span1">
<button class="btn btn-success" data-toggle="collapse"
data-target="#intro">+</button>
</div>
</div>
<div class="row-fluid summary">
<div id="intro" class="collapse">Here comes the text...</div>
</div>
</body>
</html>