      aria-describedby="test1"
      tabindex="0">
      <img role="presentation" 
	       src="images/unchecked.gif" 
		   alt=""/>Lettuce
  </li>

  <li id="cb2" 
      role="checkbox" 
      aria-checked="true" 
      tabindex="0">
      <img role="presentation" 
	       src="images/checked.gif" 
		   alt=""/>Tomato
  </li>

  <li id="cb3" 
      role="checkbox" 
      aria-checked="false" 
      tabindex="0">
      <img role="presentation" 
	       src="images/unchecked.gif" 
		   alt=""/>Mustard
  </li