An apparatus includes a code generator and a broadcaster. The code generator receives a first request from a first user and receives a second request from a second user. The code generator also generates, based on a first user role for the first user, a first segment of javascript code. The code generator also generates, based on a second user role for the second user, a second segment of javascript code. The code generator further communicates the first segment of the javascript code to a web browser of the first user and communicates the second segment of the javascript code to a web browser of the second user. The broadcaster receives a bid from the first user and communicates the bid to a server, the second user, and a third user.