$errors['year_month'] = "* year month cannot be empty.";
} elseif (!preg_match("/^[0-9]{6}\$/", $_POST['year_month'])) {
$errors['year_month'] = "* Invalied year month.";
}
if (empty($_POST['rate'])) {
$errors['rate'] = "* Rate cannot be empty.";
}
if (empty($errors)) {
$year_month = trim(mysql_prep($_POST['year_month']));
$rate = trim(mysql_prep($_POST['rate']));
$bill = new Bill();
$bill->year_month = $year_month;
$bill->rate = $rate;
$td = new T_data();
$td->year_month = $year_month;
$td->cal_totals();
$rslt = $bill->cal_bill();
/*
$result = mysql_query("SHOW TABLES LIKE '$year_month'");
$tableExist = mysql_num_rows($result) > 0;
if(!$tableExist){
echo '<script language="javascript">';
echo 'alert("error! First calculate the total weights!")';
echo '</script>';
}else{
$td->cal_totals();
$rslt=$td->cal_bill();
}
