[แก้ได้แล้วครับ]พี่ๆช่วยมาดู Code ให้ผมหน่อยครับ พอดีผมทำ List menu ให้โชว์สินค้าครับ

<?
  isset($_POST["txtType"]) ? $test = $_POST["txtType"] : $test = '';
  isset($_POST["txtbrand"]) ? $Ink = $_POST["txtbrand"] : $test = '';
  
  ?>
  <form name="frmSearch" method="post" action="<?=$_SERVER['SCRIPT_NAME'];?>" onSubmit="JavaScript:return fncSubmit();">
     ประเภทสินค้า
     
<select name="txtType" id="txtType">
  		<option value="">--</option>
        <option value="Printer" <? if($test == "Printer"){echo"selected";}?>>Printer</option>
        <option value="Ink" <? if($test == "Ink"){echo"selected";}?>>Ink</option>
        
</select>
      ยี่ห้อ 
      <select name="txtbrand" id="txtbrand">
      	 <option value="">--</option>
         <option value="Brother" <? if($Ink == "Brother"){echo"selected";}?>> Brother </option>
         <option value="Canon" <? if($Ink == "Canon"){echo"selected";}?>> Canon </option>
         <option value="Epson" <? if($Ink == "Epson"){echo"selected";}?>> Epson </option>
         <option value="HP" <? if($Ink == "HP"){echo"selected";}?>> HP </option>
     </select>
     
     <input type="submit" class="button" value="ตกลง">
    </form>
    <? 
	
	$objConnect = mysql_connect("localhost","root","2598083") or die("Error Connect to Database");
	$objDB = mysql_select_db("mydatabase1");
	mysql_query("SET names UTF8");
	$strSQL = "select * from tb_product WHERE Pd_Type ";
	if($test != "" and  $Ink  != "")
	{
	  $strSQL .= " = '".$test."' AND Pd_Name LIKE '%".$Ink."%' ";
	}
	$objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
	?>
    <? echo $test , $Ink;?>
    <table width="1020" height="92" border="1" cellpadding="1" cellspacing="0">
    
      <tr>
      
        <td height="29" colspan="2" align="center"><strong>ชื่อสินค้า</strong></td>
        <td align="center"><strong>รายละเอียดสินค้า</strong></td>
        <td align="center"><strong>ราคา (บาท)</strong></td>
        <td width="49" align="center"><strong>ประกัน</strong></td>
      </tr>
      
        <?
				while($objResult = mysql_fetch_array($objQuery))
	{
		
	?>
      <tr>
        <td width="28" height="32"><a href="../img/product/<?php echo $objResult['Pd_Picture']; ?>"  rel="lightbox"><img src="../img/product/<?php echo $objResult['Pd_Picture']; ?>" border="0" width="28" height="28" /></a></td>
        <td width="276"><strong><?php echo $objResult["Pd_Name"]; ?>&nbsp;
		<?php 
			if($objResult['Pd_Status'] == 'ไม่ขายแล้ว')
			{
				echo "<font color=\"#FF0000\">ไม่ขายแล้ว</font> ";
			}
			?>
         
        </strong></td>
        <td width="546"><strong><?php echo $objResult['Pd_Description']; ?></strong></td>
        <td width="99" colspan="-6" align="center"><strong>350</strong></td>
        <td width="49" align="center" style="color: #F00;"><strong>3Y</strong></td>
      </tr>
     
                    <?php
                    }
                    ?>
    </table>