Ho do I calculate "Today - DOB = age in years" in a PDF?

[Jem123456]

I have found a Script that caluates age into months however I need age in years. How do I change the below script?

var cDateFormat = "dd-mmm-yyyy";
var cDate = this.getField("dob").value;
if(cDate != "") {
var oDate = util.scand(cDateFormat, cDate);
}
if(oDate == null) app.alert("Invalid date: " + cDate, 1, 0);

else {
var now = new Date();
var nMonth = Number(now.getMonth());
var nYear = Number(now.getFullYear());
var diffYear = nYear - oDate.getFullYear();
var diffMonth = nMonth-oDate.getMonth();
if (diffYear) {
diffYear = diffYear * 12;
}

event.value = diffMonth + diffYear;
}

[John Waller]

Which Adobe application are you using?

[Jem123456]

Hi John,

Im using Adobe Acrobat DC

[try67]

Divide the result by 12 and round down.

[Jem123456]

Hi Try67,

Where do I insert this into the above script?

[try67 · Accepted solution]

In closer inspection, the code you used is incorrect, so I fixed it for you. Try this:

event.value = "";
var cDateFormat = "dd-mmm-yyyy";
var cDate = this.getField("dob").valueAsString;
if (cDate != "") {
	var oDate = util.scand(cDateFormat, cDate);
	if (oDate == null) app.alert("Invalid date: " + cDate, 1, 0);
	else {
		var now = new Date();
		var diffYear = now.getFullYear() - oDate.getFullYear();
		var diffMonth = now.getMonth()-oDate.getMonth();
		if (diffMonth<0) diffYear--;
		else if (diffMonth==0) {
			var diffDay = now.getDate()-oDate.getDate();
			if (diffDay<0) diffYear--;
		}
		event.value = diffYear;
	}
}

[Jem123456]

This works perfectly. Thank you try67!