Submit werkt niet.

<?php
include("mysql.php");
?>
<?php
include("nieuws_sidebar.php");
?>

<?php
	$id = $_GET['newsid'];
	$sql = mysql_query("SELECT * FROM Nieuws WHERE ID = '".$_GET['newsid']."'")
	or die (mysql_error());
?>
	<table class="news" cellspacing="0" colspan="0">
<?php
	while($row = mysql_fetch_assoc($sql)) {
		echo "<tr><th>";
		echo '<div align="center">';
		echo '<a href=/?page=Nieuws&newsid='.$hoi['ID'].'> '.$row['Titel'].'';
		echo "</div>";
		echo "</th></tr>";     
		echo "<tr><td>";
		echo $row['Bericht'];
		echo "</td>";
		echo '<tr><td align="right">';
		echo 'Gepost op '.$row['Datum'].' door '.$row['Adder'].'';
		echo "</td></tr>";    
		echo "</div>";   
	}
		echo "</table>";
?>
<?php
	if ($_SERVER['REQUEST_METHOD'] == "POST") { 
		$datum = date("l, j F Y H:i");
		$nid = $_GET['newsid'];
		if (!empty($_POST['Comment'])) {
			mysql_query("INSERT INTO `Comments` (`ID`, `nid`, `Naam`, `Comment`, `Datum`) VALUES ('','".$_GET['newsid']."', '".$_POST['Naam']."', '".$_POST['Comment']."', '".$datum."')") or die (mysql_error());
			echo '<p>Comment geplaats.</p>';
		}
		else {
			echo 'Niet alles is correct ingevuld.';
		}
	}
?>
<?php
	$sql = mysql_query("SELECT * FROM Comments WHERE nid = '".$_GET['newsid']."'")
	or die (mysql_error());
?>						 

<?php
	while($row = mysql_fetch_assoc($sql)) {
	echo '<br><table cellpadding=1 class=frame width=500>';
	echo '<tr>';
	echo '<td><b> '.$row['Naam'].' </b></td><td align=right> '.$row['Datum'].' </td>';
	echo '</tr>';
	echo '<tr>';
	echo '<td height=1 bgcolor=white colspan=2></td>';
	echo '</tr>';
	echo '<tr>';
	echo '<td colspan=2> '.$row['Comment'].'</td>';
	echo '</tr>'; 
	echo '<tr>';
	echo '<td height=1 bgcolor=white colspan=2></td>';
	echo '</tr>';
	}
	echo '</table></table></br>';
?>	
	

<table style="border: 1px solid white; padding: 4px; margin-left: 200px; background-color:#333; width:565px;>
<?php
	echo '<form name="Addcomment" action="?page=Nieuws&newsid='.$_GET['newsid'].'" method="post" >';
?>
	<tr><th style="border-bottom:1px solid white; padding-bottom:2px;">Voeg een reactie toe</th></tr>
	
	<td>Naam:</td>
	</tr>
	<br>
	<tr>
	<td><input name="Naam" id="Naam" style="width: 100px; border: 1px solid black"></input><br><br>
	</tr>
	<tr>

	<td>Reactie:</td>
	</tr>
	<tr>
	<td><textarea name="comment-textarea" id="Comment" onfocus="this.value=''; setbg('#e5fff3');" onblur="setbg('white')">Reactie..</textarea></td>
	</tr>
	<tr>
		<td><input type="submit" name="box" value="POST" id="box" style="width: 50px; border: 1px solid #82D547;  "></td>
	</tr>
	</form>
	</table>
	</center>
	<div class="meer_nieuws"><a href="?page=allnews" title="Keer terug naar nieuws" class="meernieuws">« Terug naar nieuws</a></div>

<?php
include("mysql.php");
?>
<?php
include("nieuws_sidebar.php");
?>
 
<?php
	$id = $_GET['newsid'];
	$sql = mysql_query("SELECT * FROM Nieuws WHERE ID = '".$_GET['newsid']."'")
	or die (mysql_error());
?>
	<table class="news" cellspacing="0" colspan="0">
<?php
	while($row = mysql_fetch_assoc($sql)) {
		echo "<tr><th>";
		echo '<div align="center">';
		echo '<a href=/?page=Nieuws&newsid='.$hoi['ID'].'> '.$row['Titel'].'';
		echo "</div>";
		echo "</th></tr>";     
		echo "<tr><td>";
		echo $row['Bericht'];
		echo "</td>";
		echo '<tr><td align="right">';
		echo 'Gepost op '.$row['Datum'].' door '.$row['Adder'].'';
		echo "</td></tr>";    
		echo "</div>";   
	}
		echo "</table>";
?>
<?php
	if ($_SERVER['REQUEST_METHOD'] == "POST") { 
		$datum = date("l, j F Y H:i");
		$nid = $_GET['newsid'];
		if (!empty($_POST['Comment'])) {
			mysql_query("INSERT INTO `Comments` (`ID`, `nid`, `Naam`, `Comment`, `Datum`) VALUES ('','".$_GET['newsid']."', '".$_POST['Naam']."', '".$_POST['Comment']."', '".$datum."')") or die (mysql_error());
			echo '<p>Comment geplaats.</p>';
		}
		else {
			echo 'Niet alles is correct ingevuld.';
		}
	}
?>
<?php
	$sql = mysql_query("SELECT * FROM Comments WHERE nid = '".$_GET['newsid']."'")
	or die (mysql_error());
?>						 
 
<?php
	while($row = mysql_fetch_assoc($sql)) {
	echo '<br><table cellpadding=1 class=frame width=500>';
	echo '<tr>';
	echo '<td><b> '.$row['Naam'].' </b></td><td align=right> '.$row['Datum'].' </td>';
	echo '</tr>';
	echo '<tr>';
	echo '<td height=1 bgcolor=white colspan=2></td>';
	echo '</tr>';
	echo '<tr>';
	echo '<td colspan=2> '.$row['Comment'].'</td>';
	echo '</tr>'; 
	echo '<tr>';
	echo '<td height=1 bgcolor=white colspan=2></td>';
	echo '</tr>';
	}
	echo '</table></table></br>';
?>	
 
 
<table style="border: 1px solid white; padding: 4px; margin-left: 200px; background-color:#333; width:565px;>
<?php
	echo '<form name="Addcomment" action="?page=Nieuws&newsid='.$_GET['newsid'].'" method="post" >';
?>
	<tr><th style="border-bottom:1px solid white; padding-bottom:2px;">Voeg een reactie toe</th></tr>
 
	<td>Naam:</td>
	</tr>
	<br>
	<tr>
	<td><input name="Naam" id="Naam" style="width: 100px; border: 1px solid black"></input><br><br>
	</tr>
	<tr>
 
	<td>Reactie:</td>
	</tr>
	<tr>
	<td><textarea name="comment-textarea" id="Comment" onfocus="this.value=''; setbg('#e5fff3');" onblur="setbg('white')">Reactie..</textarea></td>
	</tr>
	<tr>
		<td><input type="submit" name="box" value="POST" id="box" style="width: 50px; border: 1px solid #82D547;  "></td>
	</tr>
	</form>
	</table>
	</center>
	<div class="meer_nieuws"><a href="?page=allnews" title="Keer terug naar nieuws" class="meernieuws">« Terug naar nieuws</a></div>