A growing number of companies have adopted EC in the hope to lower costs, make better decisions, and improve customer services (Kalakota and Whinston, 1996). A recent survey shows that businesses doubled their usage of the Internet during the last year and approximately forty percent of the business owners admitted that the Internet has changed the way they do business (Facilities Design & Management, 1997). EC is delivering its advantages over the traditional commercial approaches with the help of the Internet, and more and more businesses are able to take these advantages. It is predicted that, by the end of 1990s, retailing on the Internet will become a $4-6 billion business (Martin, 1996).