Client script to validate start/end date fields

[nmcl]

We have 'end date validation' on our change request form, so that the end date has to be after the start date (logical).

I've copied this script over to a catalog client script but it's not working in the same way, it simply prompts regardless of the date entered.   Any ideas?

--- script ---

function onChange(control, oldValue, newValue, isLoading, isTemplate) {

  if (isLoading || newValue == '') {

  return;

  }

  var end = g_form.getValue("loan_required_to");

  var start = g_form.getValue("loan_required_from");

  // skip if start or end is blank

  if (start == "" || end == "") {

  return

  }

  // get user's date time display format

  var format = g_user_date_time_format;

  var isEndBeforeStart = compareDates(start, format, end, format);

  // 1 (true) if start is greater than end

  // 0 if end is greater than start of if they are the same

  // -1 if either of the dates is in an invalid format

  if (isEndBeforeStart) {

  alert("End must be after start");

  }

}

[likoko]

Interesting solution! Used that on our meilleurpret platform.