The portable telephone (and terminal equipment) according to the present invention comprises operating means 25 having a plurality of input modes and provided with at least one operating keys, for inputting data of a type in accordance with a current input mode by operation of the operating keys, a user interface process 23 for offering a user interface allowing input of data by the operating means 25, and input mode setup means 26 for switching the current input mode in the operating means 25 according to instructions of the user interface process 23. The above-mentioned user interface process 23 is generated by interpreting/executing means 22 by interpreting and executing HTML data received from receiving means 21. The type of data inputted by the operating means 25 can be switched in accordance with instructions of the user interface process 23.