Mobile terminal and program for pre-explanation of multi-function keys before executing the functions

摘要

A mobile terminal device (100), which is provided with the plurality of keys, includes: a detection interface f or detecting touching any of the keys by a user; a press detection interface for detecting pressing the key by the user; a controller for executing a first function assigned to the key at the time of detection of the user touching the key in a case where touching time period, for which the user touches the key, is equal to, or longer than, a predetermined judging time, and for executing a second function assigned to the key at the time of detection of the user touching the key in a case where the touching time period is shorter than the predetermined judging time; and an output controller for displaying an explanation on the first function on a' display unit (20) in a case where the touching time period is equal to, or longer than, the predetermined judging time.