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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 is used to show (and hide) content that is broken into sections:</p>

<div class="w3-accordion w3-light-grey">
  <button onclick="myFunction('Demo1')" class="w3-btn-block w3-left-align">Open Section 1</button>
  <div id="Demo1" class="w3-accordion-content w3-container">
    <h4>Section 1</h4>
    <p>Some text..</p>
  </div>
  <button onclick="myFunction('Demo2')" class="w3-btn-block w3-left-align">Open Section 2</button>
  <div id="Demo2" class="w3-accordion-content w3-container">
    <h4>Section 2</h4>
    <p>Some other text..</p>
  </div>
</div>

<script>
function myFunction(id) {
    document.getElementById(id).classList.toggle("w3-show");
}
</script>

</body>

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</html>