title: Jquery: get link by class or selector
body: <p>I'm creating a list of images from a folder, and then I open them in a fancybox... so I have thumnails, big images, and a text link to full image.</p>
  
  <pre><code>&lt;div id="download_image"&gt;
    &lt;p&gt;&lt;a href="images/download/folder/big/&lt;?php echo $file;?&gt;" class="fancybox"&gt;&lt;img src="&lt;?php echo $path;?&gt;&lt;?php echo $file?&gt;" /&gt;&lt;/a&gt;&lt;/p&gt;
    &lt;p&gt;&lt;a href="images/download/folder/full/&lt;?php echo $file;?&gt;.zip" class="btn-download"&gt;DOWNLOAD&lt;/a&gt;&lt;/p&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Then I'm getting images path by jquery, for each image:</p>
  
  <pre><code>var download_image = jQuery('#download_image');
  var images  = download_image.find('img');
  
  download_images.each(function(){
      var img = jQuery(this);
      var img_source = img.attr('src');
  </code></pre>
  
  <p>Now I need to get the url of the "btn-download" link for each image... but I don't know which selector must I use! Any advice?</p>