.js" type="text/javascript"></script>
</head>
<body>
  <h1>Checkbox Example (Two State)</h1>

  <div id="ex1">
        <h3 id="id-group-label">Sandwich Condiments</h3>
        <div role="group" aria-labelledby="id-group-label">
          <ul class="checkboxes">
            <li><div role="checkbox" aria-checked="false" tabindex= "0">Lettuce</div></li>
            <li><div role="checkbox" aria-checked="true"  tabindex= "0">Tomato</div></li>
            <li><div role="checkbox" aria-checked="false" tabindex= "