// JavaScript Document
function validateRegEx(regex, input, helpText, helpMessage)
{
	// See if the input data validates OK
	if (!regex.test(input))
	{
	  // The data is invalid, so set the help message and return false
	  if (helpText != null)
		helpText.innerHTML = helpMessage;
	  return false;
    }
    else
	{
	  // The data is OK, so clear the help message and return true
	  if (helpText != null)
		helpText.innerHTML = "";
	  return true;
    }
}
function validateNonEmpty(inputField, helpText)
{
	// See if the input value contains any text
	return validateRegEx(/.+/,
	  inputField.value, helpText,
	  "Please enter information");
}
function validateZipCode(inputField, helpText)
{
	// First see if the input value contains data
	if (!validateNonEmpty(inputField, helpText))
	  return false;

	// Then see if the input value is a ZIP code
	return validateRegEx(/^\d{5}$/,
	  inputField.value, helpText,
	  "Please use 5-digit ZIP code format.");
}
function validatePhone(inputField, helpText) {
	// First see if the input value contains data
	if (!validateNonEmpty(inputField, helpText))
	  return false;
	
	// Then see if the input value is a phone number
	return validateRegEx(/^\d{3}-\d{3}-\d{4}$/,
	  inputField.value, helpText,
	  "Please use format listed below");
}
function validateEmail(inputField, helpText)
{
	// First see if the input value contains data
	if (!validateNonEmpty(inputField, helpText))
	  return false;
	
	// Then see if the input value is an email address
	return validateRegEx(/^[\w\.-_\+]+@[\w-]+(\.\w{2,3})+$/,
	  inputField.value, helpText,
	  "Please enter a valid email address");
}