Одно и то же фото товара в Lightbox - [VM2&3] Общие вопросы и ошибки

<?php
/**
 *
 * Show the product details page
 *
 * @package	VirtueMart
 * @subpackage
 * @author Max Milbers, Valerie Isaksen

 * @link http://www.virtuemart.net
 * @copyright Copyright (c) 2004 - 2010 VirtueMart Team. All rights reserved.
 * @license http://www.gnu.org/copyleft/gpl.html GNU/GPL, see LICENSE.php
 * VirtueMart is free software. This version may have been modified pursuant
 * to the GNU General Public License, and as distributed it includes or
 * is derivative of works licensed under the GNU General Public License or
 * other free or open source software licenses.
 * @version $Id: default_images.php 6188 2012-06-29 09:38:30Z Milbo $
 */
// Check to ensure this file is included in Joomla!
defined('_JEXEC') or die('Restricted access');
?>

<script type="text/javascript">
jQuery.noConflict();
jQuery(document).ready(function() {
    jQuery('#additional-images').jcarousel({
      //  vertical: true,
	//	wrap: 'circular',
	        scroll: 1	
    });
});

</script>

<?php

// Product Main Image
if (!empty($this->product->images[0])) {
    ?>
    <div class="main-image">
	<?php  echo $this->product->images[0]->displayMediaFull('class="medium-image" id="medium-image"', true, "class='modal'", true);  ?>
    
    
    
    </div>
<?php } // Product Main Image END ?>

<?php





// Showing The Additional Images
// if(!empty($this->product->images) && count($this->product->images)>1) {
if (!empty($this->product->images) and count ($this->product->images)>1) {
    ?>

      <ul id="additional-images">
	<?php
	// List all Images
	if (count($this->product->images) > 0) {
	    foreach ($this->product->images as $image) { 	?>
            <li> <img src="<?php echo $image->file_url; ?>" onclick="changeMainImage(this);" alt="" /></li>
            
    <?php  }
	}
	?>
  </ul>
<script type="text/javascript">
	function changeMainImage(el){
		$('medium-image').src = el.src;
	}
</script>
<?php
} // Showing The Additional Images END ?>

function changeMainImage(el){
    $('medium-image').src = el.src;
    jQuery("#medium-image").closest("a").attr("href", el.src);
}