Contact script (Opgelost)

 <?php
include("Connect.php");
$Bericht = $_POST['Bericht'];
$Onderwerp = "TaatuPlace contact";
$Email = "contact@taatuplace.com";


  if (isset($_GET[id])) {
	$SQL = "SELECT FROM Contact WHERE id = '$_GET[id]'";
	$Query = mysql_query($SQL);
  while($Rij = mysql_fetch_array($Query)) {
	$Mail = $Rij['Mail'];
  }
  if(isset($_POST['Verzenden'])) {
	if(empty($_POST['Bericht'])) {
		echo "Geen bericht ingevuld!";
	} else {
		mail($Mail, $Onderwerp, $Bericht, $Email);
		echo "Je bericht is verzonden!";
	}
  } else { 
?>
<table border="0">
<form method="POST">
<tr>
<td><strong>Bericht:</strong></td>
<td><textarea type="text" name="Bericht"></textarea></td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="Verzenden" value="Verzenden!" /></td>
</tr>
</form>
</table>
<?php
}
}  
else {
	echo "Antwoorden mislukt!";
}
?>

<?php
include("Connect.php");
$Bericht = $_POST['Bericht'];
$Onderwerp = "TaatuPlace contact";
$Email = "contact@taatuplace.com";
 
 
  if (isset($_GET[id])) {
	$SQL = "SELECT FROM Contact WHERE id = '$_GET[id]'";
	$Query = mysql_query($SQL);
  while($Rij = mysql_fetch_array($Query)) {
	$Mail = $Rij['Mail'];
  }
  if(isset($_POST['Verzenden'])) {
	if(empty($_POST['Bericht'])) {
		echo "Geen bericht ingevuld!";
	} else {
		mail($Mail, $Onderwerp, $Bericht, $Email);
		echo "Je bericht is verzonden!";
	}
  } else { 
?>
<table border="0">
<form method="POST">
<tr>
<td><strong>Bericht:</strong></td>
<td><textarea type="text" name="Bericht"></textarea></td>
</tr>
<tr>
<td></td>
<td><input type="submit" name="Verzenden" value="Verzenden!" /></td>
</tr>
</form>
</table>
<?php
}
}  
else {
	echo "Antwoorden mislukt!";
}
?>

 $SQL = "SELECT FROM Contact WHERE id = '$_GET[id]'";
=>
 $SQL = "SELECT FROM Contact WHERE id = ". intval($_GET['id']);

$SQL = "SELECT FROM Contact WHERE id = '$_GET[id]'";
=>
 $SQL = "SELECT FROM Contact WHERE id = ". intval($_GET['id']);