ช่วยดูโค๊ด ค้นหาให้หน่อยค่ะพอดีมันแสดง field ที่เป็นภาษาไทยไม่ได้

<?php
	/*** By Weerachai Nukitram***/
	/***  http://www.ThaiCreate.Com ***/	
	
  $objConnect = mysql_connect("localhost","root","1234") or die("Error Connect to Database");
  $cs1 = "SET character_set_results=tis620";
   mysql_query($cs1) or die('Error query: ' . mysql_error()); 
   $objDB = mysql_select_db("eoffice");
?>

<h1>My Customer</h1>
<form action="<?=$_SERVER['SCRIPT_NAME'];?>" name="frmSearch" method="get">
Search <input name="employee" type="text" id="employee" value="<?=$_GET["employee"];?>">
<label>
          <input type="submit" name="search" id="search" value="ค้นหา">
  </label>
<br>
</form>
  <?
if($_GET["employee"] != "")
	{
	$objConnect = mysql_connect("localhost","root","1234") or die("Error Connect to Database");
	$cs1 = "SET character_set_results=tis620";
    mysql_query($cs1) or die('Error query: ' . mysql_error()); 
	$objDB = mysql_select_db("eoffice");
	// Search By Name or Email
	//SELECT * FROM employee,position,department WHERE employee.PosId = position.PosId AND employee.DepId=department.DepId AND employee.EmpFirstName LIKE '%แก้ว%'
	$strSQL = "SELECT * FROM employee,position,department WHERE employee.PosId = position.PosId AND employee.DepId=department.DepId AND employee.EmpFirstName LIKE '%".$_GET["employee"]."%'";
	echo $objQuery = mysql_query($strSQL) or die ("Error Query [".$strSQL."]");
	?>
<table width="409" border="1">
  <tr>
    <th width="91"> <div align="center">EmpNo</div></th>
    <th width="98"> <div align="center">EmpFirstName</div></th>
    <th width="198"> <div align="center">PosId</div></th>
    <th width="198">DepId</th>
  </tr>
<?
while($objResult = mysql_fetch_array($objQuery))
{
?>
  <tr>
    <td><div align="center"><?=$objResult["EmpNo"];?></div></td>
    <td><?=$objResult["EmpFirstName"];?></td>
     <td>
	
		<?=$objResult["PosName"];?>
	</td>

    <td><?=$objResult["DepName"];?></td>
  </tr>
<?
}
?>

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