Need check box to check when 2 or more check boxes are checked

Question

I have a pdf form with many check boxes and I am trying to find a way to auto check a box based on the selection of other boxes. For example, I have a question below and if 2 or more of the red text check boxes are marked (I used bullet points to act as a check box) I want it to check the box stating "Positive for 2 or more". I have tired to find codes that would fill a text box with a color since the text box has the calculation options and I have tried to find a code for the run a javascript when Mouse Up, but I am struggling. I am also a beginner with the javascript/calculation stuff in PDF so please dumb it down. ANY help would be appreciated!

How often do you feel tired or fatigued after you sleep?

Nearly every day
Three to four times a week
One to two times per week
One to two times per month
Never or nearly never

During your waking time, do you feel tired, fatigued, or not up to par?

Nearly every day
Three to four times a week
One to two times per week
One to two times per month
Never or nearly never

Category 2 Score:
N/A (<2 positive responses)
Positive with 2 or more positive responses (in highlighted boxes)

try67 · Answer

Check-boxes don't have a calculation event, so you need to use a field that does, like a text field. It can be hidden, of course, but in this case we can use the text field where you want to change the text color based on the result. So if the check-boxes in question are called "Sleep1", "Sleep2", "Waking1", "Waking2" and the final two fields are called "Cat2Score" (the check-box with the result, with values of "Choice1" and "Choice2") and the (read-only) text field next to the second check-box is called "Cat2ScoreText", you can use this code as the custom calculation script of the latter:

var fields = ["Sleep1", "Sleep2", "Waking1", "Waking2"];
var total = 0;
for (var i in fields) {
	if (this.getField(fields[i]).valueAsString!="Off") total++;
}
if (total<2) {
	this.getField("Cat2Score").value = "Choice1";
	event.target.textColor = color.black;
} else {
	this.getField("Cat2Score").value = "Choice2";
	event.target.textColor = color.red;
}

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