Enable to dynamically change and select the [child] choice after selecting [parent] from specified conditions. For example, there are [parent] and [child] for the following settings. ・[parent] option set list - A - B - C ・[child] option set list - 1 - 2 - 3 - 4 - 5 - 6 Hope to realize the following functions. ・When "A" is selected in [parent] option set list, [child] option set list is dynamically changed and only "1"or"2" can be selected. ・When "B" is selected in [parent] option set list, [child] option set list is dynamically changed and only "3"or"4" can be selected. ・When "C" is selected in [parent] option set list, [child] option set list is dynamically changed and only "5"or"6" can be selected.