compare buttom disappear

<!-- COMPARISON AREA -->
<?php
if(JRequest::getVar('hikashop_front_end_main',0) && JRequest::getVar('task')=='listing' && $this->params->get('show_compare')) { ?>
	<br/><?php
	if( $this->params->get('show_compare') == 1 ) {
		$js = 'setToCompareList('.$this->row->product_id.',\''.$this->escape($this->row->product_name).'\',this); return false;';
		echo $this->cart->displayButton(JText::_('ADD_TO_COMPARE_LIST'),'compare',$this->params,$link,$js,'',0,1,'hikashop_compare_button');
?>

<?php } else { ?>
	<input type="checkbox" class="hikashop_compare_checkbox" id="hikashop_listing_chk_<?php echo $this->row->product_id;?>" onchange="setToCompareList(<?php echo $this->row->product_id;?>,'<?php echo $this->escape($this->row->product_name); ?>',this);"><label for="hikashop_listing_chk_<?php echo $this->row->product_id;?>"><?php echo JText::_('ADD_TO_COMPARE_LIST'); ?></label>
<?php }
} ?>
<!-- EO COMPARISON AREA -->