wr_parent 값이 0 으로 찍히는 이유가 뭘까요?

<?
$g5_path = ".."; // 그누보드가 있는 상대경로를 적어줌
?>

    <form name=frm method=post action="<?=$g5['path']?>/bbs/write_update_nonecapcha.php" onsubmit="return checkFrm(this);">
    <input type=hidden name=w value="">
    <input type=hidden name=bo_table value="sample"> <!--보낼 게시판명-->

    <input type=hidden name=sca value="">
    <input type=hidden name=sfl value="">
    <input type=hidden name=stx value="">
    <input type=hidden name=spt value="">
    <input type=hidden name=sst value="">
    <input type=hidden name=sod value="">
    <input type=hidden name=s value="s">
    <input type=hidden name=wr_subject  value="문의합니다.">
    <input type=hidden name=wr_content  value="">
    <input type=hidden name=wr_1 value="">
    <input type=hidden name=wr_8 value="답변준비중..."> <!--/기초상태-->    
    <input type=hidden name=secret value="secret">

 

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    </form>
    
    
<script type="text/javascript">
function checkFrm(obj) {
 if(obj.wr_4.checked == false) {
  alert('개인정보 활동동의에 체크해주세요.');
  obj.wr_4.focus();
  return false;
 }
}
</script>

    
<script language="javascript">
var char_min = parseInt(<?=$write_min?>); 
var char_max = parseInt(<?=$write_max?>); 
</script>