Error on notice.php

<?php
/**
 * @package    HikaShop for Joomla!
 * @version    1.6.0
 * @author    hikashop.com
 * @copyright  (C) 2010-2012 HIKARI SOFTWARE. All rights reserved.
 * @license    GNU/GPLv3 http://www.gnu.org/licenses/gpl-3.0.html
 */
defined('_JEXEC') or die('Restricted access');
?>
<?php $cart_type = JRequest::getString('cart_type','cart'); ?>
<script type="text/javascript">
setTimeout( 'try{  window.top.document.getElementById(\'sbox-window\').close(); }catch(err){ window.top.SqueezeBox.close(); }', 99999999<?php //echo (int)$this->config->get('popup_display_time',2000);?> );
</script>
<div id="hikashop_notice_box_content" class="hikashop_notice_box_content" >
  <div id="hikashop_notice_box_message" >
    <?php
    if($cart_type == 'cart'){
      echo hikashop_display(JText::_('PRODUCT_SUCCESSFULLY_ADDED_TO_CART'),'success',true);
    }else{
      echo hikashop_display(JText::_('PRODUCT_SUCCESSFULLY_ADDED_TO_WISHLIST'),'success',true);
    }
    ?>
  </div>
  <br />
  <div id="hikashop_add_to_cart_continue_div">
    <?php echo $this->cartClass->displayButton(JText::_('CONTINUE_SHOPPING'),'continue_shopping',$this->params,'','try{  window.top.document.getElementById(\'sbox-window\').close(); }catch(err){ window.top.SqueezeBox.close(); } return false;','id="hikashop_add_to_cart_continue_button"'); ?>
  </div>
  <?php if($cart_type == 'cart'){ ?>
  <div id="hikashop_add_to_cart_checkout_div">
    <?php echo $this->cartClass->displayButton(JText::_('PROCEED_TO_CHECKOUT'),'to_checkout',$this->params,hikashop_completeLink('checkout'.$this->url_itemid),'window.top.location=\''.hikashop_completeLink('checkout'.$this->url_itemid).'\';return false;','id="hikashop_add_to_cart_checkout_button"'); ?>
  </div>
  <?php } else{ ?>
  <div id="hikashop_add_to_cart_checkout_div">
    <?php
    echo $this->cartClass->displayButton(JText::_('DISPLAY_THE_WISHLISTS'),'wishlist',$this->params,hikashop_completeLink('cart&task=showcarst&cart_type='.$cart_type.$this->url_itemid),'window.top.location = \''.hikashop_completeLink('cart&task=showcarts&cart_type='.$cart_type.$this->url_itemid).'\';return false;');
    ?>
  </div>
  <?php } ?>
</div>