function onError(form_object, input_object, object_value, error_message) {
  alert(error_message);
  return false; 
}


function hasValue(obj, obj_type) {
  if (obj_type == "TEXT" || obj_type == "PASSWORD") {
    if (obj.value.length == 0)
      return false;
    else 
      return true;
  }
  else if (obj_type == "SELECT") {
    for (i=0; i < obj.length; i++) {
      if (obj.options[i].selected)
        return true;
  	}

    return false;	
  }
  else if (obj_type == "SINGLE_VALUE_RADIO" || obj_type == "SINGLE_VALUE_CHECKBOX") {

    if (obj.checked)
      return true;
		else
      return false;	
  }
  else if (obj_type == "RADIO" || obj_type == "CHECKBOX") {
    for (i=0; i < obj.length; i++) {
      if (obj[i].checked)
        return true;
    }
    return false;	
  }
  return false;
}


function checkinteger(object_value) {
  //Returns true if value is a number or is NULL
  //otherwise returns false 

  if (object_value.length == 0)
    return true;

  //Returns true if value is an integer defined as
  //   having an optional leading + or -.
  //   otherwise containing only the characters 0-9.
  var decimal_format = ".";
  var check_char;

  //The first character can be + -  blank or a digit.
  check_char = object_value.indexOf(decimal_format)
  //Was it a decimal?
  if (check_char < 1)
    return checknumber(object_value);
  else
    return false;
}


function checknumber(object_value) {
  //Returns true if value is a number or is NULL
  //otherwise returns false 
  if (object_value.length == 0)
    return true;

  //Returns true if value is a number defined as
  //   having an optional leading + or -.
  //   having at most 1 decimal point.
  //   otherwise containing only the characters 0-9.
  var start_format = " .+-0123456789";
  var number_format = " .0123456789";
  var check_char;
  var decimal = false;
  var trailing_blank = false;
  var digits = false;

  //The first character can be + - .  blank or a digit.
  check_char = start_format.indexOf(object_value.charAt(0))
  //Was it a decimal?
  if (check_char == 1)
    decimal = true;
  else if (check_char < 1)
    return false;

  //Remaining characters can be only . or a digit, but only one decimal.
  for (var i = 1; i < object_value.length; i++)
  {
    check_char = number_format.indexOf(object_value.charAt(i))
    if (check_char < 0)
      return false;
    else if (check_char == 1) {
      if (decimal)    // Second decimal.
        return false;
      else
        decimal = true;
    }
    else if (check_char == 0) {
      if (decimal || digits)
        trailing_blank = true;
        // ignore leading blanks
    }
    else if (trailing_blank)
      return false;
    else
      digits = true;
  } 
  //All tests passed, so...
  return true;
}


function checkdate(object_value) {
  //Returns true if value is a date format or is NULL
  //otherwise returns false 
  if (object_value.length == 0)
    return true;

  //Returns true if value is a date in the mm/dd/yyyy format
  isplit = object_value.indexOf('/');

  if (isplit == -1 || isplit == object_value.length)
    return false;

  sMonth = object_value.substring(0, isplit);

  if (sMonth.length == 0)
    return false;

  isplit = object_value.indexOf('/', isplit + 1);

  if (isplit == -1 || (isplit + 1 ) == object_value.length)
    return false;

  sDay = object_value.substring((sMonth.length + 1), isplit);

  if (sDay.length == 0)
    return false;

  sYear = object_value.substring(isplit + 1);

  if (!checkinteger(sMonth)) //check month
    return false;
  else
    if (!checkrange(sMonth, 1, 12)) //check month
      return false;
    else
      if (!checkinteger(sYear)) //check year
        return false;
      else
        if (!checkrange(sYear, 0, 9999)) //check year
          return false;
        else
          if (!checkinteger(sDay)) //check day
            return false;
          else
            if (!checkday(sYear, sMonth, sDay)) // check day
              return false;
            else
              return true;
}


function checkday(checkYear, checkMonth, checkDay) {

  maxDay = 31;

  if (checkMonth == 4 || checkMonth == 6 ||
      checkMonth == 9 || checkMonth == 11)
    maxDay = 30;
  else
    if (checkMonth == 2) {
      if (checkYear % 4 > 0)
        maxDay =28;
      else
        if (checkYear % 100 == 0 && checkYear % 400 > 0)
          maxDay = 28;
        else
          maxDay = 29;
    }

  return checkrange(checkDay, 1, maxDay); //check day
}


function numberrange(object_value, min_value, max_value) {
  // check minimum
  if (min_value != null) {
    if (object_value < min_value)
      return false;
  }

  // check maximum
  if (max_value != null) {
    if (object_value > max_value)
      return false;
  }

  //All tests passed, so...
  return true;
}


function checkrange(object_value, min_value, max_value) {
  //if value is in range then return true else return false
  if (object_value.length == 0)
    return true;

  if (!checknumber(object_value))
    return false;
  else
    return (numberrange((eval(object_value)), min_value, max_value));
	
  //All tests passed, so...
  return true;
}