function checkMail(email) {
	if (typeof(email) == 'undefined') {
		return false;
	}
	var rgx1 = /(\@.*\@)|(.*\.\..*)|(.*\@\..*)|(^\.)|(\.$)|(\@\/)|(.*\@\-.*)|(.*\.$)/gi;
	var rgx2 = /^[_\w\d][\w\d\_\/\-\.]*\@[\d\w\-\.]+[0-9A-z]$/gi;
	var rgx3 = /.*\@.*\.+.*/gi;
	return !email.match(rgx1) && email.match(rgx2) && email.match(rgx3);
}