การ insert แบบวนลูป เพิ่มข้อมูลหลายๆ ข้อมูลในครั้งเดียว

<? session_start(); ?>
<? include "head_department.php"; ?>
<style type="text/css">
<!--
.style1 {color: #FFFFFF}
-->
</style>

<div class="mainbar">
          <div class="article">	 
		  <h2 align="center" class="star">เพิ่มข้อมูลผลการเรียน <?=$row[id_subject];?></h2>
		  <h2 align="center" class="star"> <?=$row[group_name];?></h2>
		  <br />
						<form name="form1" action="add_grade3.php" method="get">
       <table width="500" border="1" align="center">
<?
	include "../connect.php";
	$sql = "select *from teacher,groups,employee where teacher.id_group=groups.id_group and teacher.id_employee=employee.id_employee and employee.id_card='$_SESSION[id_card]' and teacher.id_teacher='$_GET[id_teacher]'";
	$result = mysql_db_query($db, $sql) or die ("ไม่สามารถติดต่อฐานข้อมูลได้");
	$row = mysql_fetch_array($result); 
?>
	<tr>
	  <td colspan="3" id="id_subject"><div align="center" class="style1"><input name="id_subject" type="text" value="<?=$row[id_subject];?>" readonly="1"><BR><input name="id_teacher" type="text" value="<?=$row[id_teacher];?>" readonly="1"></div></td>
</tr>
<tr>
<td width="130" bordercolor="#666666" bgcolor="#666666"><div align="center" class="style1">รหัสนักศึกษา</div></td>
<td width="180" bordercolor="#666666" bgcolor="#666666"><div align="center" class="style1">ชื่อ - นามสกุล</div></td>
<td width="20" bordercolor="#666666" bgcolor="#666666"><div align="center" class="style1">คะแนน</div></td>
</tr>  
 <?
	include "../connect.php";
	$sql = "select *from teacher,groups,employee,student,person where teacher.id_group=groups.id_group and teacher.id_group=student.id_group and student.id_card=person.id_card and teacher.id_employee=employee.id_employee and employee.id_card='$_SESSION[id_card]' and teacher.id_teacher='$_GET[id_teacher]'";
	$result = mysql_db_query($db, $sql) or die ("ไม่สามารถติดต่อฐานข้อมูลได้");
	while ($row = mysql_fetch_array($result)) {
?>
<tr>
<div align="center">
<td bordercolor="#666666"><div align="center"><input name="id_student" type="text" value="<?=$row[id_student];?>" readonly="1"></div> </td>  
<td  bordercolor="#666666"><div align="left"><input  type="text" value="<?=$row[f_name];?>&nbsp;&nbsp;<?=$row[l_name];?>" readonly="1"></div>  </td>
<td  bordercolor="#666666" ><div align="left"><input name="point" type="text"></div> </td>
</div>
</tr> 
<?  } ?>
</table>
  <div align="center"><br />
	                <input type="submit" name="submit" value="เพิ่มข้อมูล" />
	                &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
	                <input type="reset" name="reset" value="Reset" />
          </div>
	</form>
    <? include "foot_department.php"; ?>

<? session_start(); ?>
<? if ($_SESSION["sess_id"]==session_id() && $_SESSION["id_level"]=="60"){  

	include("../connect.php");
	$id_student = $_GET[id_student];
	$id_subject = $_GET[id_subject];	
	$id_teacher = $_GET[id_teacher];
$point=$_GET[point];
	$user = $_SESSION["username"];

	if($point=="") { 
	?>
	<script language="javascript">
	alert("คุณกรอกข้อมูลไม่ครบถ้วน");
	</script>
	<?
	 echo "<meta http-equiv='refresh' content=0;url=add_grade2.php>"; }else{
	$sql = "select * from sum_grades where  id_student = '".$id_student."';";
	$result = mysql_db_query($db, $sql) or die ("ติดต่อฐานข้อมูลไม่ได้11");
	if (mysql_num_rows($result)) {
	?>
	<script language="JavaScript">
	alert("ไม่สามารถเพิ่มข้อมูลนี้ได้ เนื่องจากมีข้อมูลนี้อยู่แล้ว");
	</script>
<?
	echo "<meta http-equiv='refresh'content='0;url=add_grade2.php'>";
	} else {
	mysql_query("INSERT INTO sum_grades(id_student,id_subject,id_teacher,point,user_update,update_date) values ('$id_student','$id_subject','$id_teacher','$point','$user',now())");
	//mysql_db_query($db, $sql1) or die ("ติดต่อฐานข้อมูลไม่ได้22");
}?>
	<script language="JavaScript">
	alert("เพิ่มข้อมูลเสร็จเรียบร้อย");
	</script>
<?
	echo "<meta http-equiv='refresh'content='0;url=menu.php'>";
	}
}}else{
?>
	<script language="JavaScript">
	alert("กรุณาทำการ Login เข้าสู่ระบบก่อนค่ะ");
	</script>
<?
	echo "<meta http-equiv='refresh'content='0;url=../../../index.php'>"; } ?>