ทำอย่างไร...เมื่อเราคลิ้ก LINK ให้แสดงข้อมูลข้อรถคันนั้นใน text box

<? session_start(); ?>
<?
include  "connect.php";
include  "header.php";
include  "script.php";
?>
<link href="main_style.css" rel="stylesheet" type="text/css">
<div id="left_block1" align="left"><? include"menu.php";?></div>

<div id="right_block1">
<table width="396"  align="right" style="font-size: 13px; color: #00F; font-weight: bold;">
<tr>
	<td width="103" align="center"><img src="image/print.png" width="39" height="43"></td>
	<td width="144" align="center"><img src="image/search.png" width="39" height="43"></td>
	<td width="133" align="center"><img src="image/est.png" alt="" width="25" height="27" /></td>
  </tr>
<?
//query เพื่อเอาไอดีของ PO ไปสั่งพิมพ์ 
$strSQL =  "SELECT * FROM po_mas m,po_detail d 
WHERE m.po_id= d.po_id and d.po_id = '".$_GET["txtKeyword3"]."' ORDER BY m.mas_id DESC "; 
$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
$objResult = mysql_fetch_array($objQuery)
?>
<? include"report_po_add.php"; ?>
<tr>
	<td align="center"><a href="report_po.pdf?pID=<?=$_GET["txtKeyword3"];?>" target="_blank">พิมพ์ใบสั่งซื้อ</a></td>
    <td align="center">
    <a href="javascript:MM_openBrWindow('search_bill.php','','width=300,height=200')">
    ค้นหารายการสั่งซื้อ</a></td>
    <td align="center"><a href="add_po_new.php">สร้างรายการสั่งซื้อใหม่</a></td>
  </tr>
</table>

</div>
<br><br><br><br><br><br>
<div id="right_block">
<table style="font-size:14px;border-bottom:2px dotted #999999;" width="100%" >
<tr><td><img src="image/add.png" width="30" height="30" /><b>บันทึกใบสั่งซื้อ</b></td></tr>
</table>
<br>
<form action="save_add_po.php"  name="frmMain"  method="post" onSubmit="JavaScript:return fncSubmit();"  >
<table width="940" style="font-size: 13px; text-align: left;">
<tr>
	<td height="40">&nbsp;</td>
    <td>&nbsp;</td>
    <td>เลขที่ใบรับรถ</td>
    <? 
	$y =  date("Y")+543;
	$m = date("m");
	$d = date("d");
	$date_order = $d.'-'.$m.'-'.$y;
	?>
    <td><input name="txtpo_id" type="text" class="tbl_box7" id="txtpo_id" value="<?=$_GET["txtKeyword3"];?>"></td>
    <td align="right">วันที่สั่งซื้อ</td>
    <td><input type="text" name="txtdate_order" id="txtdate_order" value="<?=$date_order;?>"></td>
</tr>
<tr>
  <td align="right">สั่งซื้อจากสาขา</td>
  <td colspan="3" align="left">
  <select name="txtbranch_no" id="txtbranch_no">
    <option value="">------------เลือก-----------</option>
    <?
			
			$strSQL = "SELECT * FROM branch ORDER BY branch_id ASC";
			$objQuery = mysql_query($strSQL);
			while($objResuut = mysql_fetch_array($objQuery))
			{
			?>
    <option value="<?=$objResuut["branch_no"];?>" size="14">
      <?=$objResuut["branch_no"]." - ".$objResuut["branch_name"];?>
      </option>
    <?
			}
	?>
  </select>
  </td>
    <td align="right" height="40">ผู้รับรถ</td>
    <? 
	$fname = "$prefix$fname $lname"; 
	?>
    <td><input type="text" name="txtname" id="txtname" value="<?=$fname;?>"></td>
    </tr>
<tr>
  <td height="12" colspan="6"><hr></td>
</tr>
<tr>
  <td widtd="91" height="40" align="right">ยี่ห้อ</td>
  <td>
            <select id="txtbrand" name="txtbrand">
                <option value="">------------เลือก-----------</option>
                <?php
                    $result = mysql_query("
                        SELECT
                            brand_id,
                            brand_name
                        FROM 
                            brand
                        ORDER BY CONVERT(brand_id USING TIS620) ASC;
                    ");
                    
                    while($row = mysql_fetch_assoc($result))
					{
                        echo '<option value="', $row['brand_id'], '">', $row['brand_name'],'</option>';
                    }
                ?>
            </select>
  </td>
  <td widtd="91" align="right">รุ่น</td>
  <td>
    <select id="txtclass" name="txtclass">
    	<option value="">------------เลือก-----------</option>
    </select><span id="waitClass"></span>
  </td>
  <td widtd="98" align="right">แบบ</td>
  <td>
    <select id="txttype" name="txttype">
    	<option value="">------------เลือก-----------</option>
    </select><span id="waitType"></span>
  </td>
</tr>
<tr>
    <td align="right" height="40">สี</td>
    <td>
    <select name="txtcolor" id="txtcolor">
      <option value="">------------เลือก-----------</option>
      <?
			$strSQL = "SELECT * FROM color ORDER BY color_id ASC";
			$objQuery = mysql_query($strSQL);
			while($objResuut = mysql_fetch_array($objQuery))
			{
			?>
      <option value="<?=$objResuut["color_id"];?>"><?=$objResuut["color_name"];?></option>
      <?
			}
			?>
    </select>
    </td>
    <td widtd="91" align="right">เลขเครื่อง</td>
    <td><input type="text" name="txtmachine_id" id="txtmachine_id" onKeyUp="javascript:this.value=this.value.toUpperCase();"></td>
    <td widtd="98" align="right">เลขถัง</td>
    <td><input type="text" name="txtchassis_id" id="txtchassis_id" onKeyUp="javascript:this.value=this.value.toUpperCase();"></td>
    </tr>
<tr>
    <td widtd="71" align="right">ราคาซื้อ</td>
    <td><input type="text" name="txtbuy" id="txtbuy" OnChange="JavaScript:chkNum(this);" onKeyUp ="chkSubmit();" /></td>
    <td widtd="59" align="right" height="40">&nbsp;</td>
    <td><input type="submit" name="btnAdd" id="btnAdd" value="เพิ่มข้อมูล"></td>
</tr>
</table>
</div>
<br><br>
</form>

</div>
<?
	$strSQL =  "SELECT * FROM po_mas m,po_detail d 
	INNER JOIN brand b ON b.brand_id = d.brand
	INNER JOIN type  t ON t.type_id  = d.type
	WHERE m.po_id= d.po_id and m.po_id = '".$_GET["txtKeyword3"]."'  "; 
	$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
	$num_row = mysql_num_rows($objQuery);
?>
<div id="right_block1">
<table width="100%" style="font-size:14px; font-family:Verdana, Geneva, sans-serif;" border="1" align="center">
<tr bgcolor="#CCCCCC">
<th width="85" height="34"> <div align="center">ลำดับ</div></th>
<th width="358"> <div align="center">เลขเครื่อง</div></th>
<th width="242"> <div align="center">เลขถัง</div></th>
<th width="167"> <div align="center">ยี่ห้อ</div></th>
<th width="216"> <div align="center">รุ่น</div></th>
<th width="106"> <div align="center">ราคาซื้อ (บาท)</div></th>
</tr>
<?
$i=1;
while($objResult = mysql_fetch_array($objQuery))
{
	$buy = $objResult["buy"];
	$total = $total + $buy;
?>

<tr bgcolor="#FFFFFF">
<td height="30" align="center"><?=$i++;?>.</td>
<td><?=$objResult["machine_id"];?></td>
<td><?=$objResult["chassis_id"];?></td>
<td><?=$objResult["brand_name"];?></td>
<td><?=$objResult["type_name"];?></td>
<td align="center"><?=number_format($buy,'2','.',',');?></td>
<td><a href="OnClick=javascript:document.getElementById('machine_id').value='<?=$objResult["machine_id"];?>';\">เลือก</a></td>

</tr>
<?
}
?>
<tr bgcolor="#CCCCCC">
<th colspan="3">จำนวนรถ  ::<u> <?=$num_row;?> </u> ::คัน</div></th>
<th width="85" colspan="2"> <div align="center">รวมเป็นเงิน (บาท)</div></th>
<th width="358"> <div align="center"><?=number_format($total,'2','.',',');?></div></th>
</tr>
</table>
</div>

if($_GET['KeyEdit']){
  /// Do somthing
 $SQL = "SELECT * FROM tbl WHRER ตัวถัง = '$_GET[KeyEdit]'"
 $Arr = mysql_fetch_array($SQL);
 $ตัวถัง = $Arr['machine_id'];
}

<a href="?KeyEdit=<?=$objResult["machine_id"];?>">LZHR001-1111111</a></td>

<a href="showuser.php?m_id=<?php echo $objResult["m_id"];?>"><?php echo $objResult["organ"];?></a>

   <?php
include ('connect.php');
$strSQL = "SELECT * FROM `member` WHERE m_id = '".$_GET["m_id"]."' ";
$objQuery = mysql_query($strSQL) or die(mysql_error());
$objResult = mysql_fetch_array($objQuery);

	$sex = array(
						'1' => 'ชาย',
						'2' => 'หญิง'
						);
if(!$objResult)
{
	echo "Not found m_id=".$_GET["m_id"];
}