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<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="../lib/w3.css">

<body class="w3-container">

<h2>Accordions</h2>
<p>An accordion with lists:</p>

<div class="w3-accordion w3-card-4">
  <button onclick="myFunction('Demo1')" class="w3-btn-block w3-left-align">
    Accordion 1
  </button>
  <div id="Demo1" class="w3-accordion-content">
    <ul class="w3-ul">
      <li>Jill</li>
      <li>Eve</li>
      <li>Adam</li>
    </ul>  
  </div>
  <button onclick="myFunction('Demo2')" class="w3-btn-block w3-left-align">
    Accordion 2
  </button>
  <div id="Demo2" class="w3-accordion-content">
    <ul class="w3-ul">
      <li class="w3-padding-hor-16">Jill</li>
      <li class="w3-padding-hor-16">Eve</li>
      <li class="w3-padding-hor-16">Adam</li>
    </ul>  
  </div>
</div>

<script>
function myFunction(id) {
    var x = document.getElementById(id);
    if (x.className.indexOf("w3-show") == -1) {
        x.className += " w3-show";
    } else { 
        x.className = x.className.replace(" w3-show", "");
    }
}
</script>

</body>
</html>