​x
 
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src="/jquery/jquery.js"></script>
<style>
  li { margin: 3px; padding: 3px; background: #EEEEEE; }
  li.hilight { background: yellow; }
</style>
</head>
<body>
  <ul>
    <li><b>Click me!</b></li>
    <li>You can also <b>Click me!</b></li>
  </ul>
<script>
  $( document ).bind("click", function( e ) {
    $( e.target ).closest("li").toggleClass("hilight");
  });
</script>
</body>
</html>
​