/* startGreaterThanEndDate2()
 * Author: David Hirsch
 * Creation Date: 3/21/02
 * Parameters: 
 *   startdate    - should be a Javascript Date object
 *   enddate      - should be a Javascript Date object
 * Return Value:
 *   true - if the startdate is later than the enddate.
 *   false - if the startdate is earlier or the same as the enddate
 */
function startGreaterThanEndDate2(startdate, enddate) {
  var startTime = startdate.getTime();
  var endTime = enddate.getTime(); 
  if (startTime > endTime){
    return true;
  }
  return false;
}


/* verifyDatePairWithFormat()
 * Author: David Hirsch
 * Creation Date: 3/27/02
 * Parameters:
 *  fieldName1(2)         - name for the first(second) date field, used in alert box
 *  name1(2)              - qualified name prefix for the date fields. 
 *                          Typically this is of the form formname.myprefix
 *                          Like the other date functions it assumes the names
 *                          follow the pattern <myprefix>DateField
 *  required1(2)          - is this date field required. If so and there is no
 *                          date then it will return false
 *  alert1(2)             - if true put up an alert box if there is an error
 *                          for this field
 * greaterthancheck       - if true check whether the first date is greater
 *                          than the second date. If so return false.
 * alertgreaterthan       - if true put up an alert box if the greater than
 *                          date check returns true
 * alertFrag              - ok this is ugly but resource bundling forces the
 *                          issue. This fragment will be consed as follows
 *                          fieldName2 + " " + alertFrag + " " + fieldName1 + "."     
 * format                 - date format sring used to parse date field into
 *                          its constituent parts
 * Return Value:
 *   true - based on the arguments, the specified dates are valid
 *   false - based on the arguments, the specified dates are invalid
 * Comments: Currently the format pattern is not passed in and is fixed by
 * this function. Note the format is used in multiple locations so we may want
 * to centralize it to one location?
 */
function verifyDatePairWithFormat(fieldName1, name1, required1, alert1, 
                                  fieldName2, name2, required2, alert2, 
                                  greaterthancheck, alertgreaterthan, 
				  alertFrag, format) {
  var date1, date2;
  var result = true;

  date1 = extractDateFromDateField(fieldName1, name1, format, required1, alert1);
  if (date1 == false) return false;

  date2 = extractDateFromDateField(fieldName2, name2, format, required2, alert2);
  if (date2 == false) return false;

  if (greaterthancheck == true) {
  //test greater than
    var dateText1 = eval('document.' + name1 + 'DateField.value');
    var theDate1 = getDateFromFormat(dateText1, format);
    var dateText2 = eval('document.' + name2 + 'DateField.value');
    var theDate2 = getDateFromFormat(dateText2, format);
    var testresult = startGreaterThanEndDate2(theDate1, theDate2);
    //alert("greater than test returned: " + testresult);
    if (testresult == true) {
     if (alertgreaterthan == true) {
       alert(fieldName2 + " " + alertFrag + " " + fieldName1 + ".");
     }
     result = false;
    };
  }
  return result;
}

/* initStartandEndDates
 * Author: David Hirsch
 * Creation Date: 3/21/02
 * Parameters:
 *   startdate    - should be a Javascript Date object
 *   enddate      - should be a Javascript Date object
 *   prefix       - prefix used with naming date related fields
 *   format       - date format string used to format date into a string
 * Comments: This will set the startdatefield to the startdate and the enddate 
 * field to the end date. Note: the individual component date fields are not
 * set by this function. They get set when the form is saved.
 * Currently the format pattern is not passed in and is fixed by
 * this function. Note the format is used in multiple locations so we may want
 * to centralize it to one location?
 */
function initStartandEndDatesWithFormat(startDate, endDate, prefix, format) {
  //alert("Format string2 is " + format);
  var startDateTxt = formatDate(startDate, format);
  var endDateTxt = formatDate(endDate, format);
  var sfname = eval(prefix + "StartDateField");
  var efname = eval(prefix + "EndDateField");
  var isfname = eval(prefix + "InitStartDateField");
  var iefname = eval(prefix + "InitEndDateField");
  sfname.value = startDateTxt;
  efname.value = endDateTxt;
  //cache init values so can see if changed
  isfname.value = startDateTxt;
  iefname.value = endDateTxt;
}