Evolving communication technology allows a particular computer system to work from a local scale network to an Internet, which is highly potential for implementing ES. Like an online ES, for instance, web usage that allows an ES to be accessible by more users. However, this system costs more complex development [14]. An ES as online consultation media has to pay attention to the interaction aspects. The systems are supposed to be capable for dynamically generating interface for the users, including from consultation process until inference process [15].