รบกวนดูCode ไห้หน่อยนะค่ะ ติดปัญหาตรงที่ไม่สามารถใส่ข้อมูลลงไปในตารางได้อ่ะค่ะ

		function insertlogbookinfo()
		{
		$staffcode =$_POST['staffcode'];
		$ed_id =$_POST['ed_id'];
		$modeltype =$_POST['modeltype'];
		$modelcode =$_POST['txtmodelcode'];
		$des_seq = $_POST['des_seq'];
		$des_sheet = $_POST['txtdessheet'];
		
		$sqlC = "select * from logbookinfo";
		$sqlC = "select * from edinfo where ed_id='$ed_id' ";
		$query = mysql_db_query($database,$sql);
		$queryC = mysql_query($sqlC) or die("error=$sqlC");
		$numC = Mysql_num_rows($queryC);
		$sql = "insert into logbookinfo (staffcode,model_type,modelcode,des_sheet,ed_id) values ('$staffcode','$modeltype','$modelcode','$des_sheet','$ed_id')";
		mysql_query($sql) or die("error=$sql");
		$sqld = "INSERT INTO des (des_no) SELECT MAX(des_seq) FROM logbookinfo";
		$queryC = mysql_query($sqld) or die("error=$sqld");
		
		}
		
		function inserttdwginfo()
		{
			$strSQL = "select * from des ";
			$query = mysql_query($strSQL) or die("error=$sqlC");
			$num = mysql_num_rows($query);
			$desseq = array();
			for($i=0;$i<count($_POST["txtTdwgno"]);$i++)
			{
				for($i=0;$i<count($_POST["txtTdwgsheet"]);$i++)
				{
				
				$sql = "insert into t_dwg(t_dwgno,t_dwgsheet,desseq) values('".$_POST["txtTdwgno"][$i]."', '".$_POST["txtTdwgsheet"][$i]."','".$desseq[$i]."')";
				$query = mysql_db_query($database,$sql);
				
				}
				
			}
			
		}
	
	echo "<script>alert(' ++ เพิ่มข้อมูลเรียบร้อยแล้ว ++');window.location='logbook.php';</script>";