<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<h2>Simple Quantity increment buttons with Javascript </h2>
<div class="col-lg-2">
<div class="input-group">
<span class="input-group-btn">
<button type="button" class="quantity-left-minus btn btn-danger btn-number" data-type="minus" data-field="">
<span class="glyphicon glyphicon-minus"></span>
</button>
</span>
<input type="text" id="quantity" name="quantity" class="form-control input-number" value="10" min="1" max="100">
<span class="input-group-btn">
<button type="button" class="quantity-right-plus btn btn-success btn-number" data-type="plus" data-field="">
<span class="glyphicon glyphicon-plus"></span>
</button>
</span>
</div>
</div>
</div>
</div>