update doet niks

require_once(dirname('_FILE_').DIRECTORY_SEPARATOR.'db.php');

require_once(dirname('_FILE_').DIRECTORY_SEPARATOR.'db.php');

<?php
$query = mysql_query("SELECT text FROM text WHERE type = 'arbeidsrecht'");
$array = mysql_fetch_array($query);
if(!isset($_POST['Submit']))
{
?>

<?php
$query = mysql_query("SELECT text FROM text WHERE type = 'arbeidsrecht'");
$array = mysql_fetch_array($query);
if(!isset($_POST['Submit']))
{
?>

<?php
} else {
$query = "UPDATE text SET text = '".$_POST['text']."' WHERE id = 5";
mysql_query($query) or die(mysql_error());
}
?>

<?php
} else {
$query = "UPDATE text SET text = '".$_POST['text']."' WHERE id = 5";
mysql_query($query) or die(mysql_error());
}
?>