<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Toggle buttons</title>
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/3.3.6/css/bootstrap.min.css"/>
</head>
<body>

<div class="panel panel-default">
  <div class="panel-heading">Radio group</div>
  <div class="panel-body">
    <div id="radio-group" class="btn-group">
      <button type="button" class="btn btn-primary" data-value="1">One</button>
      <button type="button" class="btn btn-prim