class="container">
      <header class="row">
        <div id="skip-to-attach" class="col-xs-12 col-sm-3 col-md-3 col-lg-2">
          <img src="images/w3c.png" alt="W3C Logo" style="margin-top: 2em">
        </div>
        <div class="col-xs-12 col-sm-9 col-md-9 col-lg-10">
          <h1>ARIA Landmarks Example</h1>
          <p id="inst" class="inst">Visually outline the landmarks and/or headings on the page using the following buttons.</p>
          <button type="button" onclick="showLandmarks(event)" ari