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<!DOCTYPE html> 
<html>
  <head>
    <title>ARIA 1.0 Test Case 672</title>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  </head>
  <body>
    <h1>ARIA 1.0 Test Case 672</h1>
    <ul role="listbox">
      <li role="option" aria-selected="false" id="TEST_ID" tabindex="0">Option 1</li> 
      <li role="option">Option 2</li> 
    </ul>
    
    <h2>Description</h2>
    <p>For an element with role "option" which is a child of an element with role "listbox", 
      and the value of the "aria-selected" attribute changes (from "true", or to "true").</p>
    
    <script>  
      function changeSelectedState() {
        var test_node = document.getElementById('TEST_ID');  
        var state = test_node.getAttribute('aria-selected');
     
        if (state === 'false') test_node.setAttribute('aria-selected', 'true');
        else test_node.setAttribute('aria-selected', 'true');

      }
  
     function setFocus() {
       var test_node = document.getElementById('TEST_ID');  
       test_node.focus();
       setTimeout(changeSelectedState,1000);
     }
     
     window.addEventListener('load', setFocus);
    </script>
  </body>
  
</html>