ajax 데이터 넘기기 질문

<?php
$sql_common = " from {$g5['member_table']} ";
$sql_search = " where (1) ";
$sql_search .= " and mb_id != '{$config['cf_admin']}' "; // 최고관리자 제외
$sql_order = " order by mb_id asc "; // ㄱㄴㄷ 순으로 정렬
$sql = " select count(*) as cnt {$sql_common} {$sql_search} {$sql_order} ";
$row = sql_fetch($sql);
$total_count = $row['cnt'];
$rows = 1000; // 목록수
$total_page  = ceil($total_count / $rows);  // 전체 페이지 계산
if ($page < 1) $page = 1; // 페이지가 없으면 첫 페이지 (1 페이지)
$from_record = ($page - 1) * $rows; // 시작 열을 구함
?>

 

<select name="qa_6" id="qa_6_<?php echo $i;?>" <?php if ($list[$i]['qa_5'] == "완료") { ?>onFocus="this.initialSelect = this.selectedIndex;" onChange="this.selectedIndex = this.initialSelect;"<?php } else { ?>onchange="qa6_chk('<?php echo $i;?>','<?php echo $list[$i]['qa_id'];?>',this.value);"<?php } ?>>

    <option value="">선택하세요.</option>
    <?php
    $sql_search .= " and mb_1 = '관리자' and  mb_level = '4' ";
    $sql = " select * {$sql_common} {$sql_search} {$sql_order} limit {$from_record}, {$rows}";
    $result = sql_query($sql);
    for ($ii=0; $row=sql_fetch_array($result); $ii++) {
    ?>
    <option value="<?php echo $row['mb_id']; ?>"<?php echo get_text($list[$i]['qa_6'] == $row['mb_id']) ? " selected" : "";?>><?php echo $row['mb_id']; ?></option>
    <?php } ?>
</select>

 

<script>

            var qa6_chk = function(qa_num,qa_id,field) {
                $.ajax({
                    type:"post",
                    url:"<?php echo $qa_skin_url;?>/list_up2.php",
                    data:
                    {
                        qa_num : qa_num,
                        qa_id : qa_id,
                        qa_6 : field
                    },
                    dataType:"html",
                     success:function(res){
                        $("#qa_6_"+qa_num).val(res);
                            if(res){
                                alert(res+"(으)로 변경되었습니다");
                            }else{
                                alert("변경 실패");
                            }
                            location.reload();
                        }
                });
            }

</script>

 

 

 

 

 

list_up2.php

<?php
include_once("./_common.php");

$write_table = $g5['qa_content_table'].$_POST['bo_table'];
$sql = " update ".$write_table." set qa_6 = '".$_POST['qa_6']."' where qa_id = '".$_POST['qa_id']."' ";
sql_query($sql);
$sql = "select qa_6 from ".$write_table." where qa_id = '".$_POST['qa_id']."' ";
$row = sql_fetch($sql);

if($row['qa_6'])
  echo $row['qa_6'];
else
 echo '';


echo $mb_hp;

?>