A method for providing one or more contents to a client is disclosed. The method comprise receiving a request for one or more specific contents from the client; transmitting, to the client, a contents reproducer, which allows a user of the client to define at least one new command and to define an external appearance of the contents reproducer, wherein the external appearance includes an object to be represented as the new command; and transmitting, to the client, the requested contents thereby to be reproduced using the contents reproducer.