="btn btn-primary">Primary button</button>
  </code>
        </pre>
        <br />
        <h2>Colorful buttons</h2>
        <p>It is easy to switch between button colors.</p>
        <a href="javascript:void(0)" class="btn btn-primary">Button</a>
        <a href="javascript:void(0)" class="btn btn-success">Button</a>
        <a href="javascript:void(0)" class="btn btn-danger">Button</a>
        <a href="javascript:void(0)" class="btn btn-warning">Button</a>
        <a href="javascript:void(0)" class="btn b