ค้นหาข้อมูลแล้วแก้ไข.......มันเด้งกลับไปหน้าแรกที่เราไม่ได้ค้นหา......ตลอดเลย

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link href="main_style.css" rel="stylesheet" type="text/css">
<? include"connect.php"?>
<? include"paging.php"?>
<?
//*** Delete Condition ***//
if($_GET["Action"] == "Del")
{
	$strSQL = "DELETE FROM class ";
	$strSQL .="WHERE class_id = '".$_GET["cID"]."' ";
	$objQuery = mysql_query($strSQL);
	if(!$objQuery)
	{
		echo "Error Delete [".mysql_error()."]";
	}
	//header("location:$_SERVER[PHP_SELF]");
	//exit();
}
?>
<fieldset style="width:100%; background-color:#e7e7ff;">
<legend><b>รุ่นรถ</b></legend>
<form name="frmSearch" method="get" action="<?=$_SERVER['SCRIPT_NAME'];?>">
<table style="font-family:Verdana, Geneva, sans-serif; font-size:13px;" >
    <tr>
      <th>รหัสรุ่นรถ
	  <select name="txtKeyword2" id="txtKeyword2">
			<option value="">--เลือก--</option>
			<?
			$strSQL = "SELECT * FROM brand ORDER BY brand_id ASC";
			$objQuery = mysql_query($strSQL);
			while($objResuut = mysql_fetch_array($objQuery))
			{
			?>
			<option value="<?=$objResuut["brand_id"];?>" size="14"><?=$objResuut["brand_name"];?></option>
			<?
			}
			?>
	   </select>
      <input name="txtKeyword1" type="text" id="txtKeyword1" value="<?=$_GET["txtKeyword1"];?>">
      <input type="submit" value="ค้นหา"></th>
    </tr>
  </table>
</form>
</fieldset>
<?
	include"connect.php";
	// Search By class_name,brand_id
	$strSQL = "SELECT * FROM class 
	INNER JOIN brand ON brand.brand_id = class.brand_id
	WHERE (class_name LIKE '%".$_GET["txtKeyword1"]."%' AND class.brand_id LIKE '%".$_GET["txtKeyword2"]."%')";
	$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
	$Num_Rows = mysql_num_rows($objQuery);

	$Page = (isset($_GET['Page']))? intval($_GET['Page']) : 1;
	$Per_Page = 13;   // Per Page
	
	//$Page = $_GET["Page"];
	$limit_start = ($Page-1)*$Per_Page;
	
	if(!$_GET["Page"])
	{
		$Page=1;
	
	}
	
	$Prev_Page = $Page-1;
	$Next_Page = $Page+1;
	
	$Page_Start = (($Per_Page*$Page)-$Per_Page);
	if($Num_Rows<=$Per_Page)
	{
		$Num_Pages =1;
	}
	else if(($Num_Rows % $Per_Page)==0)
	{
		$Num_Pages =($Num_Rows/$Per_Page) ;
	}
	else
	{
		$Num_Pages =($Num_Rows/$Per_Page)+1;
		$Num_Pages = (int)$Num_Pages;
	}


	$strSQL .="order  by class_no ASC LIMIT $Page_Start , $Per_Page";
	$objQuery   = mysql_query($strSQL);

	?>

<form name="frmMain" method="GET" action="<?=$_SERVER["PHP_SELF"];?>">
<input type="hidden" name="hdnCmd" value="">
<table style="font-family:Verdana, Geneva, sans-serif; font-size:13px;" width="100%">
<tr bgcolor="#000080" style="color:#FFF;">
        <td width="64" height="26" align="left"><b>รหัสรุ่น</b></td>
        <td width="361" align="left"><b>ชื่อรุ่น</b></td>
        <td width="277" align="left"><b>ยี่ห้อ</b> </td>
        <td width="179" align="center"><b>ทำรายการ</b></td>
    </tr>	
	<?
	while($objResult = mysql_fetch_array($objQuery))
	{
		$i++;
		if($i%2==0)
		{
		$bg = "#cbd0ff";
		}
		else
		{
		$bg = "#FFFFFF";
		}		
	?>
	<?
		if($objResult["class_id"] == $_GET["cID"] and $_GET["Action"] == "Edit")
        {
    ?>
<tr bgcolor="<?=$bg;?>">
		<td align="left" height="26"><?=$objResult["class_no"];?></td>
		<td>
        <input type="hidden" name="class_id" size="3" value="<?=$objResult["class_id"];?>">
        <input type="text" name="class_name" size="6" style="width:100px" onKeyPress="return english2(event,this.value)"
	 	onChange="javascript:this.value=this.value.toUpperCase();" value="<?=$objResult["class_name"];?>">
        </td>
		<td><?=$objResult["brand_name"];?></td>
        <td align="center">
          <input name="btnAdd" type="button" id="btnUpdate" value="บันทึก" OnClick="frmMain.hdnCmd.value='Update';frmMain.submit();">
          <input name="btnAdd2" type="button" id="btnCancel" value="ยกเลิก" onclick="window.history.go(-1);" />
        </td>
</tr>
	<?
	}else{
	?>  
<tr bgcolor="<?=$bg;?>">
		<td align="left" height="26"><?=$objResult["class_no"];?></td>
		<td><?=$objResult["class_name"];?></td>
		<td><?=$objResult["brand_name"];?></td>
        <td align="center">
        <a href="<?=$_SERVER["PHP_SELF"]."?Page=$Page";?>&Action=Edit&cID=<?=$objResult["class_id"];?>">
		<img src="image/edit.png" /></a>
	    <a href="JavaScript:if(confirm('คุณต้องการลบข้อมูลใช่หรือไม่ ?')==true){window.location='<?=$_SERVER["PHP_SELF"];?>	
		?Action=Del&cID=<?=$objResult["class_id"];?>';}"> <img src="image/delete.png" /></a>        
        </td>
</tr>
<? } //esle
 } //while ?>
</table>
</form>
	<br>

	<div align="center" style="font-family:Verdana, Geneva, sans-serif; font-size:13px;">
    <b>รายการทั้งหมด <?= $Num_Rows;?> รายการ : <?=$Num_Pages;?> หน้า :</b>
	<?
	if($Prev_Page)
	{
		echo " <a href='$_SERVER[SCRIPT_NAME]?Page=$Prev_Page&txtKeyword1=$_GET[txtKeyword1]&txtKeyword2=$_GET[txtKeyword2]'><< Back</a> ";
	}

	for($i=1; $i<=$Num_Pages; $i++){
		if($i != $Page)
		{
			echo "[ <a href='$_SERVER[SCRIPT_NAME]?Page=$i&txtKeyword1=$_GET[txtKeyword1]&txtKeyword2=$_GET[txtKeyword2]'>$i</a> ]";
		}
		else
		{
			echo "<b> $i </b>";
		}
	}
	if($Page!=$Num_Pages)
	{
		echo " <a href ='$_SERVER[SCRIPT_NAME]?Page=$Next_Page&txtKeyword1=$_GET[txtKeyword1]&txtKeyword2=$_GET[txtKeyword2]'>Next>></a> ";
	}
?>
	
<?
if($_GET["hdnCmd"] == "Update")
{
	$strSQL = "UPDATE class SET ";
	$strSQL .="class_name = '".$_GET["class_name"]."' ";
	$strSQL .="WHERE class_id = '".$_GET["class_id"]."' ";
	$objQuery = mysql_query($strSQL) or die (mysql_error());
	if(!$objQuery)
	{
		echo "<script>alert('บันทึกข้อมูลแล้ว');window.location='".$_SERVER['PHP_SELF']."?Page=$Page';</script>";	  
	}
	//header("location:$_SERVER[PHP_SELF]");
	//exit();
}
?>
<?
mysql_close();
?>