title: XHTML anchor link with background image and no text
body: <p>Is it possible to have anchor links no text inside that has a background image and fixed dimensions and still be good for SEO?</p>
  
  <p><b>Example CSS:</b><br/></p>
  
  <pre><code>a{display:block;width:50px;height:20px;background-image:url('images/background.jpg');background-repeat:no-repeat;background-position:0 0;}
  
  a:hover img{background-position:0 -20px;}
  </code></pre>
  
  <p><b>Example HTML:</b><br/>
  <code>&lt;a href="#"&gt;&lt;/a&gt;</code></p>