verkeerde id wordt geupdate

<? 
require("connection.php");

//If cmd has not been initialized
if(!isset($cmd)) 
{
   //display all the paintings
   $result = mysql_query("select * from kleurplaten order by id"); 
   
   //run the while loop that grabs all the paintings
   while($r=mysql_fetch_array($result)) 
   { 
      //grab the title and the ID of the paintings
      $titel=$r["titel"];//take out the title
      $id=$r["id"];//take out the id
     
	 //make the title a link
      echo "<a href='editkleurplaten.php?cmd=edit&id=$id'>Edit - $titel</a>";
      echo "<br>";
    }
}
?>
<?
if($_GET["cmd"]=="edit" || $_POST["cmd"]=="edit")
{
   if (!isset($_POST["submit"]))
   {
	  $id = $_GET["id"];
      $sql = "SELECT * FROM kleurplaten WHERE id=$id";
      $result = mysql_query($sql);        
      $myrow = mysql_fetch_array($result);
      ?>
	  
      <form action="editkleurplaten.php" method="post">
        <p>
        <input type=hidden name="id" value="<?php echo $myrow["id"] ?>">
   
      Titel:
      <INPUT TYPE="TEXT" NAME="titel" VALUE="<?php echo $myrow["titel"] ?>" SIZE=30>
      <br>
      <br>
      Link_klein:
      <INPUT TYPE="TEXT" NAME="link_klein" VALUE="<?php echo $myrow["link_klein"] ?>" SIZE=30>
      </p>
        <p>Link_groot:
          <INPUT TYPE="TEXT" NAME="link_groot" VALUE="<?php echo $myrow["link_groot"] ?>" SIZE=30>
        </p>
        <p>id:
          <INPUT NAME="id" TYPE="TEXT" id="id" VALUE="<?php echo $myrow["id"] ?>" SIZE=30>
          <br>
       
          <input type="hidden" name="cmd" value="edit">
       
          <input type="submit" name="submit" value="submit">
       
          </p>
      </form>
   
<? } ?>

<?
   if ($_POST["submit"])
   {
      $titel = $_POST["titel"];
	  $link_klein = $_POST["link_klein"];
	  $link_groot = $_POST["link_groot"];
	  
	  $sql = "UPDATE kleurplaten SET titel='$titel',link_klein='$link_klein',link_groot='$link_groot' WHERE id=$id";

      $result = mysql_query($sql);
      echo "Bijgewerkt!";
	}
}
?>

<? 
require("connection.php");
 
//If cmd has not been initialized
if(!isset($cmd)) 
{
   //display all the paintings
   $result = mysql_query("select * from kleurplaten order by id"); 
 
   //run the while loop that grabs all the paintings
   while($r=mysql_fetch_array($result)) 
   { 
      //grab the title and the ID of the paintings
      $titel=$r["titel"];//take out the title
      $id=$r["id"];//take out the id
 
	 //make the title a link
      echo "<a href='editkleurplaten.php?cmd=edit&id=$id'>Edit - $titel</a>";
      echo "<br>";
    }
}
?>
<?
if($_GET["cmd"]=="edit" || $_POST["cmd"]=="edit")
{
   if (!isset($_POST["submit"]))
   {
	  $id = $_GET["id"];
      $sql = "SELECT * FROM kleurplaten WHERE id=$id";
      $result = mysql_query($sql);        
      $myrow = mysql_fetch_array($result);
      ?>
 
      <form action="editkleurplaten.php" method="post">
        <p>
        <input type=hidden name="id" value="<?php echo $myrow["id"] ?>">
 
      Titel:
      <INPUT TYPE="TEXT" NAME="titel" VALUE="<?php echo $myrow["titel"] ?>" SIZE=30>
      <br>
      <br>
      Link_klein:
      <INPUT TYPE="TEXT" NAME="link_klein" VALUE="<?php echo $myrow["link_klein"] ?>" SIZE=30>
      </p>
        <p>Link_groot:
          <INPUT TYPE="TEXT" NAME="link_groot" VALUE="<?php echo $myrow["link_groot"] ?>" SIZE=30>
        </p>
        <p>id:
          <INPUT NAME="id" TYPE="TEXT" id="id" VALUE="<?php echo $myrow["id"] ?>" SIZE=30>
          <br>
 
          <input type="hidden" name="cmd" value="edit">
 
          <input type="submit" name="submit" value="submit">
 
          </p>
      </form>
 
<? } ?>
 
<?
   if ($_POST["submit"])
   {
      $titel = $_POST["titel"];
	  $link_klein = $_POST["link_klein"];
	  $link_groot = $_POST["link_groot"];
 
	  $sql = "UPDATE kleurplaten SET titel='$titel',link_klein='$link_klein',link_groot='$link_groot' WHERE id=$id";
 
      $result = mysql_query($sql);
      echo "Bijgewerkt!";
	}
}
?>