Update cart without reloading the page

Hello,

I am new to his forum. I need to get some insight in to the cart updating part of hikashope. When i add a product into the cart it is adding without refreshing page using AJAX and works fine. But when i tried to change increase or decrease the quantity or if we delete the quantity against an item in cart the entire page is getting refreshed. So kindly advice me if there is any option to avoid the page reloading on quantity change. Also if i make changes in the display-> view -> area from joomla backend the corresponding changes are not visible in my FTP file locations. So could any one tell me where is the location of the view files in hikashop folder in server not in admin area. So i can modify the file directly from server as the saving option from hikashop backend is taking too much time and giving connection timeout if net connection is slow.