change cart in product page

<?php $i =$this->params->get('i'); $min_quantity =$this->params->get('min_quantity'); $max_quantity =$this->params->get('max_quantity'); $html =$this->params->get('html'); ?> <table> <tr> <td class="cust_qty"> <input id="hikashop_product_quantity_field_<?php echo $i; ?>" type="text" value="<?php echo JRequest::getInt('quantity',$min_quantity); ?>" class="hikashop_product_quantity_field" name="quantity" onchange="hikashopCheckQuantityChange('hikashop_product_quantity_field_<?php echo $i; ?>',<?php echo $max_quantity; ?>,<?php echo $min_quantity; ?>);" /> </td> <td class="cust_plus"> <a id="hikashop_product_quantity_field_change_plus_<?php echo $i; ?>" class="hikashop_product_quantity_field_change_plus hikashop_product_quantity_field_change" href="#" onclick="return hikashopQuantityChange('hikashop_product_quantity_field_<?php echo $i; ?>',1,<?php echo $max_quantity; ?>,<?php echo $min_quantity; ?>);">+</a> </td> <td class="cust_minus"> <a id="hikashop_product_quantity_field_change_minus_<?php echo $i; ?>" class="hikashop_product_quantity_field_change_minus hikashop_product_quantity_field_change" href="#" onclick="return hikashopQuantityChange('hikashop_product_quantity_field_<?php echo $i; ?>',0,<?php echo $max_quantity; ?>,<?php echo $min_quantity; ?>);">&ndash;</a> </td> </tr> <tr> <td colspan="3" class="cust_button"> <?php echo $html; ?> </td> </tr> </table>