function isNumeric( value ) {
	return isFinite( (value * 1.0) );
} 

function calculateROI() {
  spendMonthlyVal = document.getElementById('spendMonthly').value * 1;
  var drycleanersPercentObj = document.getElementById('drycleanersPercent');
  drycleanersPercentVal = drycleanersPercentObj.options[drycleanersPercentObj.selectedIndex].value * 1;
  if (isNumeric(spendMonthlyVal) == false) {
    spendMonthlyVal = 100;
    document.getElementById('spendMonthly').value = "100.00";
  }
  monthlySavingsVal = (spendMonthlyVal * (drycleanersPercentVal / 100)).toFixed(2);
  annualSavingsVal = (monthlySavingsVal * 12).toFixed(2);
  document.getElementById('savingsMonthly').innerHTML = "$" + monthlySavingsVal;
  document.getElementById('savingsAnnual').innerHTML = "$" + annualSavingsVal;
  document.getElementById('ROI').innerHTML = " " + (189 / monthlySavingsVal).toFixed(1);
  }
  
function calculateSpeed() {
  hoursIroningVal = document.getElementById('hoursIroning').value * 1;
  var timesFasterObj = document.getElementById('timesFaster');
  timesFasterVal = timesFasterObj.options[timesFasterObj.selectedIndex].value * 1;
  if (isNumeric(hoursIroningVal) == false) {
    hoursIroningVal = 5;
    document.getElementById('hoursIroning').value = "5";
  }
  document.getElementById('hoursIroningLabel').innerHTML = hoursIroningVal;
  document.getElementById('saveHours').innerHTML = (hoursIroningVal - (hoursIroningVal / timesFasterVal)).toFixed(0);
  }