Abstract: Method of executing an interactive user interface application between a terminal client (2) installed at a user and a resource centre server (1) within a network, characterised in that to perform an interaction, it comprises a temporary inversion sequence comprising steps to: the client (2) sends a message (20) to initialise a temporary inversion sequence to the server (1), and the client (2) starts a client alternative module, the server (1) receives said initialisation message (20), and the server (1) starts a server alternative module controlling execution of the user interface sequence, the server (1) sends a termination message (24) to the client (2) to terminate the temporary inversion sequence when the interaction is terminated.