function ValidEmail(_formField, _errorMessage, _displayMethod){
  var result = true;
  if (result && (!_formField.value.match(/^[\w-][\w\d.%+-]+\@(?:[\w\d-.]+\.)+\w{2,4}$/)) ){
    _displayMethod(_errorMessage);
    _formField.focus();
    result = false;
  }
  return result;
}

function ValidPostalCode(_formField, _errorMessage, _displayMethod){
  var result = true;
  if (Trim(_formField.value) == "" || !AllNumbers(_formField.value)){
    _displayMethod(_errorMessage);
    _formField.focus();
    result = false;
  }
  return result;
}

function ValidRequired(_formField, _errorMessage, _displayMethod){
  var result = true;
  if (Trim(_formField.value) == ""){
    _displayMethod(_errorMessage);
    _formField.focus();
    result = false;
  }
  return result;
}

function ValidDuplicate(_dupFormField, _formField, _errorMessage, _displayMethod){
  var result = true;
  if (_dupFormField.value != _formField.value ){
    _displayMethod(_errorMessage);
    _formField.focus();
    result = false;
  }
  return result;
}

function ValidRequiredSelection(_formField, _errorMessage, _displayMethod)
{
  var result = true;
  if (_formField.selectedIndex == 0 || _formField.selectedIndex == -1)
  {
    _displayMethod(_errorMessage);
    _formField.focus();
    result = false;
  }
  return result;
}

function ValidRequiredMultipleSelection(formField, _errorMessage, _displayMethod)
{
  for (i = 0; i< formField.length; i++)
  {
    if (formField.options[i].selected)
      return true;
  }
  _displayMethod(_errorMessage);
  formField.focus();
  return false;
}

function ValidRequiredRadio(_formField, _errorMessage, _displayMethod) {
  var result = false;
  for (i = 0; i <_formField.length; i++) {
    if (_formField[i].checked)
      result = true;
  }

  if (!result)
    _displayMethod(_errorMessage);

  return result;
}

function GetRadioValue(_formField) {
  var result = -1;
  for (i = 0; i <_formField.length; i++) {
    if (_formField[i].checked)
      result = _formField[i].value;
  }

  return result;
}

function SpecialCharacters(str){
  var result = true;
  var RE = /@+/;
  if (!RE.test(str))
    result = false;
  return result;
}

function AllNumbers(str)
{
  var result = true;
  var RE = /^\d+$/;
  if (!RE.test(str))
    result = false;
  return result;
}

function AllLetters(str)
{
  var result = true;
  var RE = /^\w+$/;
  if (!RE.test(str))
    result = false;
  return result;
}

function AllCharacters(str)
{
  var result = true;
  var RE = /^[\w\d]+$/;
  if (!RE.test(str))
    result = false;
  return result;
}

function LTrim(_value){
  var RE = /\s*((\S+\s*)*)/;
  return _value.replace(RE, "$1");
}

function RTrim(_value){
  var re = /((\s*\S+)*)\s*/;
  return _value.replace(re, "$1");
}

function Trim(_value){
  return LTrim(RTrim(_value));
}