I had to change
url = 'index.php?option=com_oscommerce&osMod=ajax_shopping_cart' + ( senddata.products_id ? 'products_id='+senddata.products_id+'&' : "" ) + 'action=add_product';
into
url = 'index.php?option=com_oscommerce&osMod=ajax_shopping_cart' + '&format=ajax' + ( senddata.products_id ? 'products_id='+senddata.products_id+'&' : "" ) + 'action=add_product';
but Javascript code generated by backend is invalid! still exists and instead of the whole page only the div from the shoppingcart.php is shown in the shoppingcart box instead of updating this box. Where should I look?











