Tryit Editor v2.9

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<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.css">
<script src="http://code.jquery.com/jquery-1.11.3.min.js"></script>
<script src="http://code.jquery.com/mobile/1.4.5/jquery.mobile-1.4.5.min.js"></script>
</head>
<body>

<div data-role="page" id="pageone">
  <div data-role="header">
    <h1>Nested Collapsible Blocks</h1>
  </div>

  <div data-role="main" class="ui-content">
    <div data-role="collapsible">
      <h1>Click me - I'm collapsible!</h1>
      <p>I'm the expanded content.</p>
      <div data-role="collapsible">
        <h1>Click me - I'm a nested collapsible block!</h1>
        <p>I'm the expanded content in the nested collapsible block.</p>
      </div>
    </div>
  </div>

  <div data-role="footer">
    <h1>Insert Footer Text Here</h1>
  </div>
</div> 

</body>
</html>