function VerifyTabLogin(f) {
	// set up params
	var ErrorString  = "";
	
	if (isBlank(f['E-mail'])) ErrorString += "\n - Email Address is required";
	else if (!isBlank(f['E-mail']) && testSimpleEmail(f['E-mail'])) ErrorString += "\n - Your Email Address is formatted improperly";
	if (isBlank(f.Password)) ErrorString += "\n - Password is required";
	return errorAlert(ErrorString);
}