if($show[status_surat=="diterima"] = TRUE){
$q1 = mysql_query("SELECT j_barang FROM tbl_barang_detail
INNER JOIN tbl_suratbarang
ON tbl_suratbarang.id_detail_data_barang=tbl_barang_detail.id_detail_data_barang
WHERE tbl_suratbarang.id_surat=$id_surat") or die (mysql_error());
$q2 = mysql_query("SELECT jum_barang FROM tbl_suratbarang WHERE id_surat=$id_surat") or die (mysql_error());
$hasil = $q1 - $q2;