title: jQuery hover a link swap image
body: <p>I want to do the follow, if a user hover on a link that the image will swap with a image with '-on' at the end.</p>
  
  <p>But how can i get the swap thing on the image when i hover the a tag?</p>
  
  <p><strong>HTML code:</strong></p>
  
  <pre><code>&lt;div&gt;
      &lt;a href="#"&gt;
          &lt;img src="image.jpg" alt="" /&gt;
          Here some caption
      &lt;/a&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p><em>I can not place the image urls in the header...</em></p>