title: Show "loading" while a new image is loading
body: <p>I have </p>
  
  <pre><code>&lt;img src="..." class="myImage"&gt;
  &lt;a href="..." class="changeImage"&gt;
  
  $(function(){
     $('a.changeImage').click(function(){
         $('img.myImage').attr('src',NEWVALUE);
     });
  });
  </code></pre>
  
  <p>When I click the link, i inject a new src to <code>.myImage</code>. Is it possibile to show a loading image while the new src is loading?</p>