javascript not working on pop up

[gagan m s]

hello the below code does work on the create issue pop up or when issue type is changed.

it is the code to add business days to due date depending upon the priority value.

any help is appreciated.

<script>
function validate()
{
var now = new Date();
if(document.getElementById("customfield_18094").value == 28180 )
{
    days = 5;
}
else
    if(document.getElementById("customfield_18094").value == 28181 )
    days = 1;
else
    
    days = 3;


  var dayOfTheWeek = now.getDay();
  var calendarDays = days;
  var deliveryDay = dayOfTheWeek + days;
  if (deliveryDay >= 6) {
    days -= 6 - dayOfTheWeek;
    calendarDays += 2;
    deliveryWeeks = Math.floor(days / 5);
    calendarDays += deliveryWeeks * 2;
  }
  now.setTime(now.getTime() + calendarDays * 24 * 60 * 60 * 1000);
  var monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun",
  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
var today = new Date();
today = now;
var numberOfDaysToAdd = 7;
//today.setDate(today.getDate() + numberOfDaysToAdd);
var dd = today.getDate();
var mm = today.getMonth();
var yyyy = today.getFullYear();
today = dd + '/' + monthNames[mm] + '/' + yyyy;
document.getElementById("customfield_18091").value = today;
if(!document.getElementById("customfield_18091").value)
{alert("empty")}
return false;
}
document.getElementById("customfield_18094").addEventListener("change", validate);
</script>

[Kyle Moseley]

Do you get any error message from the browser console?