ช่วยดู code .ให้ด้วยค่ะ ได้ code javascript เป็นการตรวจสอบการ update ถ้าสถานนะห้อง (status )ไม่ว่าง(B)

<script type="text/javascript">
function doSubmit(frm){
if(frm.ข้อมูลอื่นๆ.value == ""){
alert("กรอก ข้อมูลอื่นๆ");
return false;
}else if(frm.hdn_status.value == "ไม่ว่าง"){
alert("ไม่สามารถ update ข้อมูลได้");
return false;
}else{
return true;
}
}
</script>
         <?
$host="localhost";
$username="root";
$password="";
$db="hotelmis";
$tb="rooms";
$connect= mysql_connect( $host,$username,$password) or die ("?????????????????? Mysql ?????? ");
mysql_select_db($db) or die("????????????????????");
$sql="select * from $tb where roomid=$roomid";
mysql_query("SET NAMES 'tis620'"); 
$db_query=mysql_db_query($db,$sql);
$result = mysql_fetch_array($db_query);
$roomid=$result[roomid];
$roomno=$result[roomno];
$floor=$result[floor];
$value_room=$result[value_room];
$aircondition =$result[aircondition ];
$fun =$result[fun ];
$status =$result[status ]
?>
</p>
       <table width="95%" align="center">
         <tr>
           <td colspan="2"><span class="style4">rooms <?echo"<b>$roomno</b>";
?></span> <span class="style14">
           <input name="roomid" type="hidden" id="roomid" value="<? echo"$roomid"; ?>" />
           </span></td>
          </tr>
         <tr>
           <td width="118">หมายเลขห้อง</td>
           <td width="323"><input name="roomno" type="text" id="roomno" value='<? echo"$roomno";?>' /></td>
         </tr>
         <tr>
           <td><label onClick="return (document.getElementById('checkbox_row_2') ? false : true)" for="checkbox_row_2"></label>
               <label onClick="return (document.getElementById('checkbox_row_3') ? false : true)" for="checkbox_row_3">ชั้น</label></td>
           <td><input name="floor" type="text" id="floor" value="<? echo"$floor ";?>" /></td>
         </tr>
         <tr>
           <td><label onClick="return (document.getElementById('checkbox_row_3') ? false : true)" for="checkbox_row_3">ค่าห้อง</label></td>
           <td><input name="value_room" type="text" id="value_room" value="<? echo"$value_room ";?>" /></td>
         </tr>
         
         
         
         <tr>
           <td><p>แอร์</p>
             <p> พัดลม</p></td>
           <td><p align="left">
             <input name="aircondition" type="checkbox" id="article"  value="Y" <?echo $aircondition==Y? "checked":""?> />
           </p>
             <p>
                            <input name="fun" type="checkbox" id="article"  value="Y" <?echo $fun==Y? "checked":""?> />
             </p></td>
         </tr>
         <tr>
           <td>สถานะ</td>
           <td><table width="90%" border="0" cellpadding="1">
             <tr>
               <td ><input name="status" type="radio" value="V" checked="checked" <?echo $status==V? "checked":""?> />
                 ว่าง ( V )</td>
               <td><input name="status" type="radio" value="B" <?echo $status==B? "checked":""?> />
                 ล็อก ( B )</td>
             </tr>
           </table></td>
         </tr>
         <tr>
           <td>&nbsp;</td>
           <td>&nbsp;</td>
         </tr>
         <tr>
           <td>&nbsp;</td>
           <td><input name=" onsubmit" type="submit" id=" onsubmit" value="แก้ไขข้อมูล">
             <input type="reset" name="Submit2" value="ยกเลิก"></td>
         </tr>
         <tr>
           <td colspan="2"><div id="RequestDetails">
             <input type="button" name="Submit3" value="รายการห้องเช่า" onClick="loadHTML('room_list.php','RequestDetails','room')"/>
           </div></td>
          </tr>
       </table>
       <p>&nbsp;</p>
       <p>&nbsp;</p></td>
   </tr>
 </table>
 <p>&nbsp;</p>
</form>