영카트 주문내역리스트에 회원 닉네임 검색을 추가하고싶습니다.

<?php$sub_menu = '400400';include_once('./_common.php'); auth_check($auth[$sub_menu], "r"); $g5['title'] = '주문내역';include_once (G5_ADMIN_PATH.'/admin.head.php');include_once(G5_PLUGIN_PATH.'/jquery-ui/datepicker.php'); $where = array(); $sql_search = "";if ($search != "") {    if ($sel_field != "") {      if ($sel_field == 'mb_nick'){        $res = sql_fetch("select mb_id from {$g5['member_table']} where mb_nick like '%".$search."%'");        $where[] = " mb_id = '{$res['mb_id']}' ";      }else{        $where[] = " $sel_field like '%$search%' ";      }    }     if ($save_search != $search) {        $page = 1;    }} //이하 생략...

<label for="sel_field" class="sound_only">검색대상</label><select name="sel_field" id="sel_field">    <option value="od_id" <?php echo get_selected($sel_field, 'od_id'); ?>>주문번호</option>    <option value="mb_id" <?php echo get_selected($sel_field, 'mb_id'); ?>>회원 ID</option>    <option value="od_name" <?php echo get_selected($sel_field, 'od_name'); ?>>주문자</option>    <option value="mb_nick" <?php echo get_selected($sel_field, 'mb_nick'); ?>>닉네임</option>    <option value="od_tel" <?php echo get_selected($sel_field, 'od_tel'); ?>>주문자전화</option>    <option value="od_hp" <?php echo get_selected($sel_field, 'od_hp'); ?>>주문자핸드폰</option>    <option value="od_b_name" <?php echo get_selected($sel_field, 'od_b_name'); ?>>받는분</option>    <option value="od_b_tel" <?php echo get_selected($sel_field, 'od_b_tel'); ?>>받는분전화</option>    <option value="od_b_hp" <?php echo get_selected($sel_field, 'od_b_hp'); ?>>받는분핸드폰</option>    <option value="od_deposit_name" <?php echo get_selected($sel_field, 'od_deposit_name'); ?>>입금자</option>    <option value="od_invoice" <?php echo get_selected($sel_field, 'od_invoice'); ?>>운송장번호</option></select>/* 이하 생략 */