php 회원정보 불러오기 질문드립니다.!!

로그인 처리코드

<?
session_start();
?>
<meta charset="utf-8">
<?
$id = $_POST['id'];
$pass = $_POST['pass'];
$name = $_POST['name'];
$nick = $_POST['nick'];
$level = $_POST['level'];

   // ��ȭ�鿡�� ̸�� Էµ�� ʾ�� "�̸�� Է��ϼ��"
   // �޽��
   if(!$id) {
     echo("
           <script>
             window.alert('��̵�� Է��ϼ��.')
             history.go(-1)
           </script>
         ");
         exit;
   }

   if(!$pass) {
     echo("
           <script>
             window.alert('��й�ȣ�� Է��ϼ��.')
             history.go(-1)
           </script>
         ");
         exit;
   }

include "../lib/dbconn.php";

$sql = "select * from member where id='$id'";
$result = mysql_query($sql, $connect);

$num_match = mysql_num_rows($result);

   if(!$num_match)
   {
     echo("
           <script>
             window.alert('��ϵ�� ̵��Դϴ�.')
             history.go(-1)
           </script>
         ");
    }
    else
    {
        $row = mysql_fetch_array($result);

$db_pass = $row[pass];

        if($pass != $db_pass)
        {
           echo("
              <script>
                window.alert('��й�ȣ�� Ʋ��ϴ�.')
                history.go(-1)
              </script>
           ");

           exit;
        }
        else
        {
           $id = $row[id];
         $name = $row[name];
         $nick = $row[nick];
         $level = $row[level];

           $_SESSION['id'] = $_POST['id'];
           $_SESSION['name'] = $_POST['name'];
           $_SESSION['nick'] = $_POST['nick'];
           $_SESSION['level'] = $_POST['level'];
           $_SESSION['pass'] = $_POST['pass'];
           $_SESSION['hp1'] = $_POST['hp1'];
           $_SESSION['hp2'] = $_POST['hp2'];
           $_SESSION['hp3'] = $_POST['hp3'];
           $_SESSION['email1'] = $_POST['email1'];
           $_SESSION['email2'] = $_POST['email2'];

           echo("
              <script>
                location.href = '../index.php';
              </script>
           ");
        }
   }
?>
회원정보에 회원정보 뿌려주는 코드

<?
    session_start();
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta charset="utf-8">
<link href="../css/common.css" rel="stylesheet" type="text/css" media="all">
<link href="../css/member.css" rel="stylesheet" type="text/css" media="all">
<script>
   function check_id()
   {
     window.open("check_id.php?id=" + document.member_form.id.value,
         "IDcheck",
          "left=200,top=200,width=250,height=100,scrollbars=no,resizable=yes");
   }

   function check_nick()
   {
     window.open("check_nick.php?nick=" + document.member_form.nick.value,
         "NICKcheck",
          "left=200,top=200,width=250,height=100,scrollbars=no,resizable=yes");
   }

   function check_input()
   {
      if (!document.member_form.pass.value)
      {
          alert("��й�ȣ�� Է��ϼ��");
          document.member_form.pass.focus();
          return;
      }

      if (!document.member_form.pass_confirm.value)
      {
          alert("��й�ȣȮ�� Է��ϼ��");
          document.member_form.pass_confirm.focus();
          return;
      }

      if (!document.member_form.name.value)
      {
          alert("�̸�� Է��ϼ��");
          document.member_form.name.focus();
          return;
      }

      if (!document.member_form.nick.value)
      {
          alert("�г�� Է��ϼ��");
          document.member_form.nick.focus();
          return;
      }

      if (!document.member_form.hp2.value || !document.member_form.hp3.value )
      {
          alert("�޴�� ȣ�� Է��ϼ��");
          document.member_form.nick.focus();
          return;
      }

      if (document.member_form.pass.value !=
            document.member_form.pass_confirm.value)
      {
          alert("��й�ȣ�� ġ�� ʽ��ϴ�.\n�ٽ� �Է��ּ��.");
          document.member_form.pass.focus();
          document.member_form.pass.select();
          return;
      }

document.member_form.submit();
}

   function reset_form()
   {
      document.member_form.id.value = "";
      document.member_form.pass.value = "";
      document.member_form.pass_confirm.value = "";
      document.member_form.name.value = "";
      document.member_form.nick.value = "";
      document.member_form.hp1.value = "010";
      document.member_form.hp2.value = "";
      document.member_form.hp3.value = "";
      document.member_form.email1.value = "";
      document.member_form.email2.value = "";

document.member_form.id.focus();

      return;
   }
</script>
</head>
<?
    include "../lib/dbconn.php";

$sql = "select * from member where id='$id'";
$result = mysql_query($sql, $connect);

$row = mysql_fetch_array($result);

    $hp = explode("-", $row[hp]);
    $hp1 = $hp[0];
    $hp2 = $hp[1];
    $hp3 = $hp[2];

    $email = explode("@", $row[email]);
    $email1 = $email[0];
    $email2 = $email[1];

mysql_close();
?>
<body>
<div id="wrap">
<div id="header">
<? include "../lib/top_login2.php"; ?>
</div>

  <div id="form_join">
   <div id="join1">
   <ul>
   <li>* 아이디</li>
   <li>* 비밀번호</li>
   <li>* 비밀번호 확인</li>
   <li>* 이름</li>
   <li>* 닉네임</li>
   <li>* 전화번호</li>
   <li>   *이메일</li>
   </ul>
   </div>
   <div id="join2">
   <ul>
   <li><?= $_SESSION['id'] ?></li>
   <li><?=$_SESSION['pass'] ?><input type="password" name="pass"></li>
   <li><?=$_SESSION['pass'] ?><input type="password" name="pass_confirm"></li>
   <li><?= $_SESSION['name'] ?></li>
   <li><div id="nick1"><?= $_SESSION['nick']?><input type="text" name="nick"></div><div id="nick2" ><a href="#"><img src="../img/check_id.gif" onclick="check_nick()"></a></div></li>
   <li><?= $_SESSION['hp1]']?><input type="text" class="hp" name="hp1">
             - <?= $_SESSION['hp2]']?><input type="text" class="hp" name="hp2"> - <?= $_SESSION['hp3]']?><input type="text" class="hp" name="hp3"></li>
   <li><?= $_SESSION['email1]']?><input type="text" id="email1" name="email1"> @ <?= $_SESSION['hp3]']?><input type="text" name="email2"></li>
   </ul>
   </div>
   <div class="clear"></div>
   <div id="must"> * 필수 입력 사항입니다.^^</div>
  </div>

</body>
</html>

이렇게 짰는데요 회원정보 페이지에 들어가보면 id 랑 비밀번호는 세션값을 받아서 화면에 나오는데

그이외에 닉네임 이름 전화번호 이메일 얘네들이 화면에 안나오는데

닉네임 ,이름 ,전화번호 ,이메일 하는방식을 id랑 똑같이했는데 왜이런걸까요??