function checkEmail($email,$alert) {
	if ($alert!==0) {
		$alert=1;
	}
	var reg = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
	if(!reg.test($email)) {
		if ($alert) {
			alert('The email address you entered does not appear to be valid. Please try again!');
			return false;
		} else {
			return false;
		}
	}
	return true;
}