Method for managing an electronic-commerce shopping cart

A method and system for managing an electronic commerce (e-commerce) shopping cart relating to communication between a shopper and a server over a communication network. A sever whether a shopping command of the shopper has changed an attribute of a primary item in the shopping cart. After the server has determined that the shopping command has changed the attribute of the primary item in the shopping cart, the server identifies a secondary item in the shopping cart linked to the primary item. The server changes a corresponding attribute of the secondary item in response to the change in the attribute of the primary item, wherein the attribute of the primary item is a quantity of the primary item, a color of the primary item, or a size of the primary item.