รบกวนดูโค้ให้หน่อยนะค่ะมัน error ว่า Warning: mysql_fetch_array(): supplied argument is not a valid MySQL result resource in C:\AppServ\www\Maefahluang\admin.php on line 31

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<?
include ("connet.php");
?>
  <?

$page=$_GET[page];
if ($page==""){
$page=1;
}
$each=5;


$sql_admin = "SELECT * FROM admin;";
$result_admin = mysql_query($sql_admin);
$totals=mysql_num_rows($result_admin);

$totalpages=ceil($totals/$each);
$goto=($page-1)*$each;

$sql_admin="SELECT * FROM admin ORDER BY id_admin DESC limit $goto,$each;";
$result_admin=mysql_query($sql_admin);
?>



<?
//การสร้าง Autorun รหัสประเภทสินค้า นั่นเอง
$sql="select max(id_admin) as id_admin from admin";
$result=mysql_db_query($dbname,$sql);
$dbarr=mysql_fetch_array($result);
if($dbarr){
$total= $dbarr['id_admin']+1;
if (strLen($total)=="1"){
$total="0".$total;
}else{
$total= $total;
}
}else{
$total= $id_admin;
}

?>
<form method="post" action="admin_action.php?do=add">
  <table width="500" border="0" align="center">
    <tr>
      <th align="right" scope="col">::<img src="20121116050143551_easyicon_cn_32.png" alt="" width="20" height="20" /> เพิ่มผู้ดูแลระบบ::</th>
    </tr>
  </table>
  <table width="534" border="0" align="center">
    <tr align="right" >
      <td width="151">รหัสผู้ดูแลระบบ::</td>
<td width="373" align="left" ><?=$total; ?></td>
    </tr>
    <tr >
      <td align="right">Username ::</td>
      <td><label for="title"></label>
      <input type="text" name="logname" id="logname" /></td>
    </tr>
    <tr >
      <td align="right">Password ::</td>
      <td><label for="detile">
        <input type="password" name="password" id="password" />
      </label></td>
    </tr>
    <tr >
      <td align="right">ชื่อ-นามสกุล</td>
      <td><label for="news_date">
        <input type="text" name="name" id="name" />
      </label></td>
    </tr>
    <tr align="right">
      <td>Tel ::</td>
      <td align="left"><input type="text" name="tel" id="tel"></td>
    </tr>
    <tr align="right">
      <td>E-Mail ::</td>
      <td align="left"><input name="email" type="text" id="email" size="30" /></td>
    </tr>
    <tr align="right">
      <td colspan="2" align="center"><input type="submit" name="button" id="button" value="เพิ่มผู้ดูแลระบบ" />
        <input type="reset" name="button2" id="button2" value="ยกเลิก" />
      <input type="hidden" name="id_admin" value="<?=$total; ?>" /></td>
    </tr>
  </table>
  <p>&nbsp;</p>
</form>
<table width="591" border="0" align="center">
    <tr>
      <th colspan="6" align="center" scope="col">จัดการข้อมูลผู้ดูแลระบบ </th>
    </tr>
    <tr align="center">
      <td width="91">ลำดับที่ </td>
      <td width="139">ชื่อผู้ใช้ </td>
      <td width="127">รหัสผ่าน </td>
       <td width="127">ชื่อ - นามสกุล </td>
      <td width="132">รายละเอียด</td>
      <td width="59">แก้ไข</td>
      <td width="98">ลบ</td>
    </tr>
    <?
  while ($dbarr_admin = mysql_fetch_array($result_admin)){
	  
?>
    <tr align="center">
     
      <td><? echo $dbarr_admin['id_admin'] ?></td>
      <td><? echo $dbarr_admin['logname'] ?></td>
      <td><? echo $dbarr_admin['password'] ?></td>
        <td><? echo $dbarr_admin['name'] ?></td>
     
      
       <td align="center"><a href="showadmin.php?ty=<?=$dbarr_admin['logname'] ?>"><img src="20121116050309842_easyicon_cn_128.png" alt="" width="20" height="20" /></a></td>
       
      <td><a href ="admin_action.php?do=frmedit&id=<? echo $dbarr_admin['id_admin'] ?>"><img src="20121116050301729_easyicon_cn_80.png" alt="" width="20" height="20" /></a></td>
      
      <td align="center"><a href="admin_action.php?do=delete&id=<? echo $dbarr_admin['id_admin'] ?>"><img src="20121116050436121_easyicon_cn_128.png" alt="" width="20" height="20" /></a></td>
    </tr>
     <?
  }
  ?> 
  
 
    <tr>
<td></td>
<td colspan="3" align="right">รวมทั้งหมด <?=$totals?> รายการ :
<? //Code ใช้ เมื่อ จำนวนหน้ามากกว่า 1 หน้า
if($totalpages>1) {
for ($i=1;$i<=$totalpages;$i++){
if($i==$page) {
echo "<b>หน้า $page </b>";
} else {
echo " | <a href=\"admin.php?page=$i\">$i</a>&nbsp;";
}
}
}

?>
</table>