function checkValues() {
	var greatDealsPromo = document.singupPromosNewsletters.greatDealsPromo.checked;
	var greatDealsNewsletter = document.singupPromosNewsletters.greatDealsNewsletter.checked;
	var email = document.singupPromosNewsletters.emailAddress.value;
	
	var $errorFlag = false;
	var	$errorMsg = '';	
	
	if(greatDealsPromo==false && greatDealsNewsletter==false) {
		$errorFlag = true;
		$errorMsg += 'Please select which newsletter you would like to subscribe\n';	
	}
	
	if(!email) {
		$errorFlag = true;
		$errorMsg += 'Please provide your email address\n';	
	}
	
	if(email && !isValidEmail(document.singupPromosNewsletters.emailAddress)){
		$errorFlag = true;
		$errorMsg += 'Please provide a valid email address.\n';
	}
	
	if($errorFlag==true) {
		alert($errorMsg);
		return false;
	} else {
		return true;
	}
}