function is_valid_email(field) {
	var good;
	var goodEmail = field.match(/\b(^(\S+@).+((\.com)|(\.net)|(\.edu)|(\.mil)|(\.gov)|(\.org)|(\..{2,2}))$)\b/gi);
	if (goodEmail){
   		return true;
	}
	return false;
}

function checkEmail(field, msg) {
	if (!is_valid_email(field)) {
		alert(msg);
		return false;
	}
	return true;
}