<html>
  <body>
    <a href="foo">
      <img src="unread.jpg" alt="" role="presentation">unread
    </a>
    <a href="foo">
      <img src="read.jpg" alt="">read
    </a>
    <a href="foo">
      <img src="read.jpg" alt>read
    </a>
    <a href="foo">
      <img src="read.jpg">read
    </a>
  </body>
</html>