อยากสอบการการ สร้างเงื่อนในการกด ปุ่ม แล้วเมื่อกดแล้วไม่ให้ กดได้อีก ให้เป็นค่า Flase ไม่สามารถกดได้อีก

<input type="Submit" value="Submit" onclick="this.disabled=1; this.form.submit();">

<center><table width="100%" border="1" cellpadding="2" cellspacing="0" bordercolor="#F29179">
  		<tr>
        <tr bgcolor="#FF99CC">
      	<th height="36" colspan="11" bgcolor="#F5D3A3" scope="col"><span class="style1">Order</span> </th>
   	 	</tr>
    	<tr bgcolor="#E6F5B6">
      	<th width="6%" bgcolor="#E6F5B6">Order Id</th>
      	<th width="15%" bgcolor="#E6F5B6">Customer Name</th>
      	<th width="5%" bgcolor="#E6F5B6">Amount</th>
        <th width="5%" bgcolor="#E6F5B6">Point</th>
      	<th width="10%" bgcolor="#E6F5B6">Order Time</th>
        <th width="25%" bgcolor="#E6F5B6">Confirm Point</th>
      	<th width="25%" bgcolor="#E6F5B6">Status</th>
    	</tr>
 <?php 
	$sql = "select oid,odate,ship_name,grandtotal,osname,point,o.osid,cid
			from  orders as o 
			inner join orderstatus as os
			on o.osid=os.osid
			order by oid desc";
	$result = mysql_query($sql) or die($sql);
	$num = mysql_num_rows($result);
	
	for ($i=1; $i<=$num; $i++){ 
		$row = mysql_fetch_array($result);
		$color=(@$color=="#ffffff")?"#81b39c":"#ffffff";
?>
       <tr bgcolor="<?php echo $color?>">
       <th><a href="../../Cake/backoffice/orderdetail.php?oid=<?php echo $row["oid"] ?>"target="_blank"><?php echo $row["oid"] ?></a> <input type="hidden" name="hiddenField" id="<?php echo $row["oid"] ?>" />
       <th><?php echo $row["ship_name"] ?></th>
       <th><?php echo $row["grandtotal"] ?></th>
       <th><?php echo $row["point"] ?></th>
       <th><?php echo $row["odate"] ?></th>
       <th><input type="submit" name="button" id="button" value="Update Point"
       onClick="window.location='updatepoint.php?oid=<?php echo $row["oid"] ?>'">
       <input type="hidden" name="hiddenField" id="<?php echo $row["oid"] ?>"></th>
       <th><?php echo $row["osname"]?></th>
       </tr>
       <?php }?>
 	   </table></center>

<tr bgcolor="<?php echo $color?>">
       <th><a href="../../Cake/backoffice/orderdetail.php?oid=<?php echo $row["oid"] ?>"target="_blank"><?php echo $row["oid"] ?></a> <input type="hidden" name="hiddenField" id="<?php echo $row["oid"] ?>" />
       <th><?php echo $row["ship_name"] ?></th>
       <th><?php echo $row["grandtotal"] ?></th>
       <th><?php echo $row["point"] ?></th>
       <th><?php echo $row["odate"] ?></th>
       <th><?php echo buttondisable ($row["pactivate"]==1) ?><input type="button" name="button" id="button" value="Update Point"  
       onClick="window.location='updatepoint.php?oid=<?php echo $row["oid"] ?>;'">

function buttondisable($int){
  if ($int==1)
	return "show";
  else
	return "hidden";
}