จะส่งค่า GET ผ่านฟอร์ม search ยังไงเหรอครับ ผมทำแล้วค่าไม่มีอ่ะครับ

<th align="center"><a id="View" class="various iframe"  href='FormSelect_Material3.php?ID_Pack=<?php echo $Re_SQL["ID_Pack"];'>

<?
$ID_Pack = $_GET["ID_Pack"]; <<<--------- ตอนนี้ $ID_Pack มีค่าครับ
?>
<form name="frmSearch" method="get" action="<?=$_SERVER['SCRIPT_NAME'];?>">
  <table width="599" border="1">
    <tr>
      <th>พิมพ์สิ
      <input name="txtKeyword" type="text" id="txtKeyword" value="<?=$_GET["txtKeyword"];?>">
      <input type="submit" value="Search"></th>
    </tr>
  </table>
</form>
<?
if($_GET["txtKeyword"] != "")
	{
include('config.inc.php');

	$strSQL = "SELECT * FROM material_last WHERE (Name LIKE '%".$_GET["txtKeyword"]."%' or Code LIKE '%".$_GET["txtKeyword"]."%' 
	or Type LIKE '%".$_GET["txtKeyword"]."%' or Class LIKE '%".$_GET["txtKeyword"]."%')";
	$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
	?>
<form name="frmMain" action="Select_Material3.php?ID_Pack=<? echo $ID_Pack ?>" method="post" OnSubmit="return onSave();">
<table>
<tr>
    <td width="5%"> <div align="center">ลำดับ </div></td>
    <td width="40%"> <div align="center">Name </div></td>
    <td width="15%"> <div align="center">Code </div></td>
    <td width="20%"> <div align="center">Quantity</div></td>
    <td width="7%"> <div align="center">Type </div></td>
    <td width="7%"> <div align="center">Class </div></td>
    <td width="6%"> <div align="center">Add </div></td>
  </tr>
<?php	
#$num = mysql_num_rows($qrr);
while($rs = mysql_fetch_array($objQuery)){
    echo "<tr>";
	echo "<td align='center'>";
   echo $rs['ID_Material'];
    echo "</td>";
	echo "<td align='center'>";
    echo $rs['Name'];
    echo "</td>";
	echo "<td align='center'>";
    echo $rs['Code'];
    echo "</td>";
	echo "<td><input type='text' name='Quantity[".$rs['ID_Material']."]'> ";
    echo "</td>";
	echo "<td align='center'>";
    echo $rs['Type'];
    echo "</td>";
	echo "<td align='center'>";
    echo $rs['Class'];
    echo "</td>";
    echo "<td width='28' align='center'>";
    echo "<input type='checkbox' name='checkGE[".$rs['ID_Material']."]'  value='".$rs['ID_Material']."'>";
    echo "</td>";
    
}
?>	

<td></td>
</tr>

<input type="submit" name="btnDelete" value="บันทึก" />
</table>

	<?
	mysql_close($objConnect);
}
?>
</form>

<?
include('config.inc.php');
$ID_Pack = $_GET["ID_Pack"];
 foreach($_POST["checkGE"] as $key => $value){
    if($value != ''){
        if($_POST['Quantity'][$key] != ''){
            $unit = $_POST['Quantity'][$key];
        }else{
            $unit = '0';
        }
        $sql = "insert into  pack_material (ID_Pack,ID_Material,Quantity) values ('$ID_Pack ','".$key."','$unit')"; ตรงนี้อ่ะครับ
	$query = mysql_query($sql);
    }
}
echo $_SESSION["ID_Pack"] ;

mysql_close($objConnect);
?>