21. The method according to claim 20 , wherein the predetermined user operation includes operation for canceling the switching of the onscreen representation, and wherein the switching of the onscreen representation is cancelled if it is judged by the judging that the predetermined user operation is performed, and the switching of the onscreen representation is performed if it is judged by the judging that the predetermined user operation is not performed.
21. The method according to claim 20 , wherein the predetermined user operation includes operation for canceling the switching of the onscreen representation, and wherein the switching of the onscreen representation is cancelled if it is judged by the judging that the predetermined user operation is performed, and the switching of the onscreen representation is performed if it is judged by the judging that the predetermined user operation is not performed. 28. The method according to claim 21 , wherein the operation for canceling the switching of the onscreen representation includes at least one of scrolling operation, storing operation and printing operation.