ขอถามเรื่อง autocomplete กับ ดาต้าเบสค่ะ มันไปเอาค่าเก่าในเบสที่ลบออกไปมาแสดงให้อ่ะคะ

 <th width="42%" height="41" scope="row"> <p id='selectop'>รุ่น
        <label for="txtVersion"></label>
      <input type="text" name="txtVersion" id="txtVersion" class="auto"> </p>    
     <p id='add_country' style="display:none;"><label>Country:</label><input type='text' name='txtVersion' id='txtVersion' value=''></p>
     	<script type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.min.js">
    </script>
	<script type="text/javascript" src="http://code.jquery.com/ui/1.10.1/jquery-ui.min.js"></script><script type="text/javascript">
		$(function(){            
			
			$("#Balltype").autocomplete({       
				source: "search.php?op=find", minLength:1 
			 });           
			 
			 $("#btn_plus").click(function(){
					 $("#selectop").hide();
					 $("#add_country").show();  //เ
					  
			 });
		 });
        </script>

<?php
	$host="127.0.0.1";
	$user="root";
	$pass="1234";
	$dbname="mit";
	$connect=mysql_connect($host,$user,$pass);
	$data=mysql_query($dbname);
	$objDB = mysql_select_db($dbname);
	mysql_query("SET NAMES UTF8");
	mysql_query("SET character_set_results=utf8");
	mysql_query("SET character_set_client=utf8");
	mysql_query("SET character_set_connection=utf8");
	mb_internal_encoding('UTF-8');
	mb_http_output('UTF-8');
	mb_http_input('UTF-8');
	mb_language('uni');
	mb_regex_encoding('UTF-8');
	ob_start('mb_output_handler');
	setlocale(LC_ALL, 'th_TH');
	
	$op=$_GET['op'];
	if($op == "find"){
	$keyword=trim($_GET['term']);
	$sql=mysql_query("SELECT Balltype FROM ball_model WHERE Balltype LIKE '%$keyword%'");
	
	 while($row = mysql_fetch_array($sql)) {
	        $return_arr[] =  $row['Balltype'];
	    }
			if($keyword != $sql){
		echo ("Not have");
	}
    echo json_encode($return_arr);
	}

?>