จะ Insert ข้อมมูลลง DB จากฟอร์มเดียว ลง 3 ตารางอ่ะคับ ต้องทำประมาณไหนบ้างครับ

<?php
mysql_connect('localhost', 'root', '') or die (mysql_error());
mysql_select_db('yourdatabases') or die (mysql_error());

if($_POST['tMode'] == 'insert'){
	$sql = " INSERT INTO tb_bill (id_member, id_program) ";
	$sql.= " VALUES ";
	$sql.= " ('".$_POST['id_memeber']."', '".$_POST['id_program']."') ";
	
	$qr_sql = mysql_query($sql) or die (mysql_error());
	
	if($qr_sql){
		echo 'Save is done !!! ';
	}else{
		echo 'Command error : '.$qr_sql;
	}
}

?>
<form name='Myfrm' action='' method='POST'>
<label>Member : </label>
<select name="id_member">
	<option value='0'></option>
		<?php
			$sel = " SELECT id_member, name FROM tb_member ";
			$qr = mysql_query($sql) or die (mysql_error());
			while($fetch = mysql_fetch_assoc($qr)){
				echo "<option value=\"".$fetch['id_member']."\">".$fetch['name']."</option> ";
			}
		?>
</select>

<label>Program : </label>
<select name="id_program">
	<option value='0'></option>
		<?php
		$sel1 = " SELECT id_program, program FROM tb_program ";
			$qr1 = mysql_query($sql1) or die (mysql_error());
			while($fetch1 = mysql_fetch_assoc($qr1)){
				echo "<option value=\"".$fetch1['id_program']."\">".$fetch1['program']."</option> ";
			}
		?>
</select>
<input type='hidden' name='tMode' value='insert' />
<input type='submit' name='submit' value='Save' />
</form>