JavaScript Question for Novice

Question

I'm an Adobe novice when it comes to JavaScript. I have a form that has Date of Birth and Date Form Completed and I want to calculate Age based on those two dates. How can I do this?
thanks
Anthony

Answer 1

You need to use Acrobat JavaScript and the JavaScript Date Time object and the extract the full year, month and date from the date objects and compute the age.
var DOB = this.getField("Date of Birth");
var EndDate = this.getField("Date Form Completed";
var cDateFormat = "d-mmm-yyyy"; // format of date fields;
event.value = "";
var dobValue = this.getField("Date of Birth").value; // dob value;
var dateValue = this.getField("Date Form Completed").value; // end date value;
if (dobValue != "" && dateValue !="") {
var oDob = util.scand(cDateFormat, dobValue); // dob to date object;
var oDate = util.scand(cDateFormat, dateValue); // end date to date object;
var age = now.getFullYear() - dob.getFullYear(); // difference in years;
// adjustment if date of birth before the end date;
if ((now.getMonth() * 100) + now.getDate() < (dob.getMonth() * 100) + dob.getDate() ) {
age--;
} // end adjustment for dob before end date;
event.value = age;
} // end input fields not empty;
You will have to adjust the field names and date formats as needed to match your form.