11. A computer readable storage medium according to claim 10 , wherein: the entry word data includes the plurality of entry words which are sequentially ordered from a first entry word to a final entry word; when the long push operation is performed for the predetermined time period or longer in the entry word candidate display area, the entry word change operation detection means detects which of the first sub area and the second sub area of the entry word candidate display area is represented by the input coordinate set from the coordinate set input means; during entry word change processing executed repeatedly, (a) when the input coordinate set from the coordinate set input means currently represents the second sub area, the second display control means erases at least an entry word displayed at a most forward position in the entry word candidate display area, and displays a new entry word subsequent to an entry word displayed at a most rearward position in the entry word candidate display area; and (b) when the input coordinate set from the coordinate set input means currently represents the first sub area, the second display control means erases at least an entry word displayed at the most rearward position in the entry word candidate display area, and displays a new entry word preceding an entry word displayed at the most forward position in the entry word candidate display area.
10. A computer readable storage medium according to claim 7 , wherein the second display control means executes entry word change processing repeatedly while the user keeps the coordinate set input instruction after the long push operation for the predetermined time period is detected by the entry word change operation detection means.