Nog een probleempje.

<?php 
require_once('connect.php');

$query = "SELECT * FROM gastenboek ORDER BY id DESC"; 
$sql=mysql_query($query) or die (mysql_error());
 
while ($obj=mysql_fetch_object($sql)) {
	$id = $obj->id; 
    $door = $obj->door;
    $datum = $obj->datum;
	$email = $obj->email;
    $bericht = $obj->bericht;
?>
<table>
<form action="edit.php" method="post">
	<tr>
		<th>ID: </th>
		<td><input type="text" name="id" value="<?php echo $id; ?>" size="25" /></td>
	</tr>
	<tr>
    	<th>Naam: </th>
		<td><input type="text" name="door" value="<?php echo $door; ?>" size="25" /></td>
    <tr>
		<th>Datum: </th>
		<td><input type="text" name="datum" value="<?php echo $datum ?>" size="25" /></td>
	</tr>
	<tr>
		<th>Email: </th>
		<td><input type="text" name="email" value="<?php echo $email ?>" size="25" /></td>
	</tr>
    <tr>
		<th>Bericht: </th>
    	<td><textarea cols="25" rows="7" wrap="VIRTUAL"><?php echo $bericht; ?></textarea></td>
    </tr>
	<tr>
		<th colspan="2"><input name="submit" type="submit" id="submit" value="Edit" /></th>
	</tr>
	</form>
</table><br />
<?php } ?>

<?php 
require_once('connect.php');
 
$query = "SELECT * FROM gastenboek ORDER BY id DESC"; 
$sql=mysql_query($query) or die (mysql_error());
 
while ($obj=mysql_fetch_object($sql)) {
	$id = $obj->id; 
    $door = $obj->door;
    $datum = $obj->datum;
	$email = $obj->email;
    $bericht = $obj->bericht;
?>
<table>
<form action="edit.php" method="post">
	<tr>
		<th>ID: </th>
		<td><input type="text" name="id" value="<?php echo $id; ?>" size="25" /></td>
	</tr>
	<tr>
    	<th>Naam: </th>
		<td><input type="text" name="door" value="<?php echo $door; ?>" size="25" /></td>
    <tr>
		<th>Datum: </th>
		<td><input type="text" name="datum" value="<?php echo $datum ?>" size="25" /></td>
	</tr>
	<tr>
		<th>Email: </th>
		<td><input type="text" name="email" value="<?php echo $email ?>" size="25" /></td>
	</tr>
    <tr>
		<th>Bericht: </th>
    	<td><textarea cols="25" rows="7" wrap="VIRTUAL"><?php echo $bericht; ?></textarea></td>
    </tr>
	<tr>
		<th colspan="2"><input name="submit" type="submit" id="submit" value="Edit" /></th>
	</tr>
	</form>
</table><br />
<?php } ?>

<?php
require_once('connect.php');
	$id=$_POST['id'];
	$door=$_POST['door'];
	$datum=$_POST['datum'];
	$email=$_POST['email'];
	$bericht=$_POST['bericht'];
if($_POST['submit'])
{
	mysql_query("UPDATE gastenboek SET door='$door' email='$email' datum='$datum' bericht='$bericht' WHERE='$id'");
	echo("Gelukt");
}
else
{
	echo("MISLUKT");
}
?>

<?php
require_once('connect.php');
	$id=$_POST['id'];
	$door=$_POST['door'];
	$datum=$_POST['datum'];
	$email=$_POST['email'];
	$bericht=$_POST['bericht'];
if($_POST['submit'])
{
	mysql_query("UPDATE gastenboek SET door='$door' email='$email' datum='$datum' bericht='$bericht' WHERE='$id'");
	echo("Gelukt");
}
else
{
	echo("MISLUKT");
}
?>