Page Comparison

var startDateCustomFieldId = 10101;//Date picker - Start Date
var testDaysCustomFieldId = 10200;//Number field - Test Length in Days

var now = new Date()
var start = cfValues[startDateCustomFieldId]
if(start != null){
  if(start.getTime() > now.getTime() ){
  	0
  } else {
	Math.min(100, Math.ceilround(dayBetweenDates(start, now)/cfValues[testDaysCustomFieldId]*100))
  }
}

function dayBetweenDates(date1, date2){
	return (date2.getTime() - date1.getTime())/ (1000 * 3600 * 24)
}

var endDateCustomFieldId = 10011;//Formula date field - End Date
var agingCustomFieldId = 10202;//Number field - Aging Length in Days

var now = new Date()
var end = cfValues[endDateCustomFieldId]
if(end != null){
  if(end.getTime() > now.getTime() ){
  	0
  } else {
	Math.min(100, Math.ceilround(dayBetweenDates(end, now)/cfValues[agingCustomFieldId]*100))
  }
}

function dayBetweenDates(date1, date2){
	return (date2.getTime() - date1.getTime())/ (1000 * 3600 * 24)
}