Show/hide with multi check boxes

Show/hide with multi check boxes

Trying to show/hide 3 fields  (17, 18 and 19) based on checkbox values.  

So far I have the following, which works fine if one box in field 16 is checked but hides all 3 fields if more than one check box is ticked.  Is there a better way to do this?

if (input.intake_form_1_question_16.toString()  ==  "Completion Date")
{
    show intake_form_1_question_17;
}
else
{
    hide intake_form_1_question_17;
}
if (input.intake_form_1_question_16.toString()  ==  "1st Fix Start Date")
{
    show intake_form_1_question_18;
}
else
{
    hide intake_form_1_question_18;
}
if (input.intake_form_1_question_16.toString()  ==  "Other")
{
    show intake_form_1_question_19;
}
else
{
    hide intake_form_1_question_19;
}