registreerfout

hallo, ik heb een script maar in google chrome en mozilla werkt dit niet, als je registreert werlaad de pagina gewoon, maar in ie doet hij het wel, hoe kan ik dat oplossen?

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<?PHP
error_reporting(E_ALL);
session_start();

include("includes/_mysql_connection.php");

$limiet = 25000;
$limiet_online = 1500;
$ledennu = mysql_query("SELECT `id` FROM `users`");
$ledennu = mysql_num_rows($ledennu);
$ledenonline = mysql_query("SELECT `id` FROM `users` WHERE `lastclick`>".(time() - 900)) or die(mysql_error());
$ledenonline = mysql_num_rows($ledenonline);
$landenQ = mysql_query("SELECT * FROM `landen`");

while($res = mysql_fetch_assoc($landenQ))
{
$landen[$res['id']] = $res['land'];
}

include("./includes/_functions.php");

$regged = false;
$username = "";
$email = "";

if(isset($_POST['submit_register']))
{
$username = trim($_POST['username']);
$email = trim($_POST['mailadres']);
$email = trim($_POST['email_check']);
$mailadres = $_POST['mailadres'];
$email_check = $_POST['email_check'];
$pass = $_POST['password'];
$pass_check = $_POST['password_check'];
$code = $_POST['code'];
$land = $_POST['land'];

if(!is_name($username))
{
$error = "Je hebt een ongeldige gebruikersnaam ingevoerd!";
}
if(!is_email($email))
{
$error = "Je hebt een ongelige e-mail ingevoerd!";
}
if(strlen($pass) < 5)
{
$error = "Je wachtwoord moet minimaal 5 tekens zijn!";
}
if($pass != $pass_check)
{
$error = "De opgegeven wachtwoorden zijn ongelijk!";
}

if($mailadres != $email_check)
{
$error = "De opgegeven e-mails zijn ongelijk!";
}

$host = gethostbyaddr($_SERVER['REMOTE_ADDR']);

// if(!ereg("nl$", $host) && !ereg("be$", $host) && !ereg("arpa$", $host) && $_SERVER['REMOTE_ADDR'] != "127.0.0.1")
// {
// $error = "IP's buiten Nederland en Belgi&euml; zijn geblockt!";
// }
if($_SESSION['code_captcha'] != $code)
{
$error = "De code was niet gelijk aan het plaatje!";
}
if(!array_key_exists($land, $landen))
{
$error = "Het land dat je hebt opgegeven bestaat niet!";
}

$nameSet = mysql_query("SELECT `id` FROM `users` WHERE `username`='".mr($username)."' LIMIT 1") or die(mysql_error());
$emailSet = mysql_query("SELECT `id` FROM `users` WHERE `email`='".$email."' LIMIT 1") or die(mysql_error());

if(mysql_num_rows($nameSet) == 1)
{
$error = "Er is al iemand met deze gebruikersnaam!";
}
if(mysql_num_rows($emailSet) == 1)
{
$error = "Er is al iemand met dit e-mailadres!";
}
if($ledennu >= $limiet)
{
$error = "Het ledenlimiet is bereikt! Probeer het later weer.";
}

$isRg = mysql_query("SELECT `id` FROM `users` WHERE `ip`='".$_SERVER['REMOTE_ADDR']."' LIMIT 1") or die(mysql_error());
$isRegged = mysql_num_rows($isRg);

if(($isRegged >= 1 || ( isset($_COOKIE['regged']) && $_COOKIE['regged'] == "yes" )) && $_SERVER['REMOTE_ADDR'] != '91.182.143.109')
{
$error = "Er is al geregistreerd vanaf deze computer!";
}

if(!isset($error))
{
if(isset($_POST['rec']) && ctype_digit($_POST['rec']))
{
mysql_query("UPDATE `status` SET `refs`=`refs`+1 WHERE `id`=".$_POST['rec']) or die(mysql_error());
mysql_query("UPDATE `count_missions_hour` SET `m_9`=`m_9`+1 WHERE `id`=".$_POST['rec']) or die(mysql_error());
mysql_query("UPDATE `speldata` SET `bankmoney`=`bankmoney`+15000 WHERE `id`=".$_POST['rec']) or die(mysql_error());
}

$sql = mysql_query("INSERT INTO `users`(`username`, `email`,`ip`, `registerDate`, `sha512`) VALUES ('".$username."', '".$email."', '".$_SERVER['REMOTE_ADDR']."', NOW(), '".hash("sha512", $pass)."')") or die(mysql_error());

$_SESSION['__id'] = mysql_insert_id();

$tabellen = array(
"status" => "id",
"userstats" => "id",
"usertimes" => "id",
"profiel" => "id",
"uitrust" => "id",
"count_missions_all" => "id",
"count_missions_hour" => "id",
"count_missions" => "id"
);

foreach($tabellen AS $tabel => $id)
{
mysql_query("INSERT INTO `".$tabel."`(`".$id."`) VALUES (".$_SESSION['__id'].")") or die(mysql_error());
}
mysql_query("INSERT INTO `speldata`(`id`, `land_id`) VALUES (".$_SESSION['__id'].", ".$_POST['land'].")") or die(mysql_error());

setcookie("regged", "yes", (time() + (60*60*24*365)) );

$regged = true;

mysql_query("INSERT INTO `sessions`(`id`, `SESSID`) VALUES (".$id.", '".$_COOKIE['PHPSESSID']."')") or die(mysql_error());
mysql_query("INSERT INTO `login`(`id`, `ip`,`date`) VALUES (".$id.", '".$_SERVER['REMOTE_ADDR']."', NOW())") or die(mysql_error());

}
}

$_SESSION['code_captcha'] = rand(1000, 9999);
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">;
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<link rel="shortcut icon" href="/images/favicon.ico">
<link rel="icon" href="/images/favicon.ico">
<link href="/css/homepage.css" rel="stylesheet" type="text/css" />
<title>*****</title>
</head>
<body>
<div id="container">
<div id="header" style="background-image: url('/homepage/images/header_bg_cc.jpg');">
<div id="display">
<div id="navigation">
<ul id="menu">
<li><a href="/" >home</a></li>
<li><a href="/register.php" class="active">registreren</a></li>
<li><a href="/screenshots.php" >screenshots</a></li>
</ul>
</div>
<div id="login">
<form method="post" action="/login.php">
User: <input type="text" class="login" name="username" maxlength="25" /> &nbsp; Pass: <input type="password" class="login" name="password" />
<br /><br />
<a href="/passlost.php" class="darkred">Wachtwoord vergeten?</a> &nbsp; <input type="submit" name="submit_login" class="submit" value="login" />
</form>
</div>
</div>
</div>
<div id="content">
<div id="stats">
<h2>&raquo; stats</h2>
<p>
Leden: <b><?=$ledennu?></b> / <i><?=$limiet?></i><br />
Online: <b><?=$ledenonline?></b> / <i><?=$limiet_online?></i><br /><br />
Reset: <b><?=$reset?></b><br />
Prijs: <b><?=$prijzen?></b>
</p>
</div><form method="post" action="/register.php">
<h1>Registreren</h1>
<table cellspacing="3">
<?php
if($regged){

echo "Je hebt succesvol geregistreerd!<br>Klik <a href='nieuws.php'><b>hier</b></a> om naar het spel te gaan.";

} else {

if(isset($_POST['submit']))
{
echo "<b>".$error."</b><br />";
}

if(isset($_GET['rec']))
{
$sql = mysql_query("SELECT `id` FROM `users` WHERE `username`='".trim(mysql_real_escape_string($_GET['rec']))."' LIMIT 1") or die(mysql_error());

if(mysql_num_rows($sql) == 1)
{
$r = mysql_fetch_assoc($sql);

echo "<input type='hidden' name='rec' value='".$r['id']."'>";
}
}
?>
<tr>
<td style="vertical-align: top;">
<table border='0' cellspacing='0' style='margin: 0px;'>
<tr>
<td>
<img src='/images/icons/user.png' alt='' border='0'>
</td>
<td>
&nbsp;Gebruikersnaam:
</td>
</tr>
</table> </td>
<td>
&nbsp;<input type="text" name="username" maxlength="25" value=""/> <a href="#" title="Letters, getallen of een streepje, minimaal 1 letter. 3-25 tekens." style="text-decoration: underline">?</a>
</td>
</tr>
<tr>
<td style="vertical-align: top;">
<table border='0' cellspacing='0' style='margin: 0px;'>
<tr>
<td>
<img src='/images/icons/email.png' alt='' border='0'>
</td>
<td>
&nbsp;E-mailadres:
</td>
</tr>
</table> </td>
<td>
&nbsp;<input type="text" name="mailadres" maxlength="75" value=""/> <a href="#" title="Vul een geldig e-mailadres in! Nodig voor onder andere wachtwoord vergeten." style="text-decoration: underline">?</a>
</td>
</tr>
<tr>
<td style="vertical-align: top;">
<table border='0' cellspacing='0' style='margin: 0px;'>
<tr>
<td>
<img src='/images/icons/email.png' alt='' border='0'>
</td>
<td>
&nbsp;E-mailadres check:
</td>
</tr>
</table> </td>
<td>
&nbsp;<input type="text" name="email_check" maxlength="75" value="" /><br />
</td>
</tr>
<tr>
<td style="vertical-align: top;">
<table border='0' cellspacing='0' style='margin: 0px;'>
<tr>
<td>
<img src='/images/icons/key.png' alt='' border='0'>
</td>
<td>
&nbsp;Wachtwoord:
</td>
</tr>
</table> </td>
<td>
&nbsp;<input type="password" name="password" /><br />
</td>
</tr>
<tr>
<td style="vertical-align: top;">
<table border='0' cellspacing='0' style='margin: 0px;'>
<tr>
<td>
<img src='/images/icons/key.png' alt='' border='0'>
</td>
<td>
&nbsp;Wachtwoord check:
</td>
</tr>
</table> </td>
<td>
&nbsp;<input type="password" name="password_check" maxlength="75" /><br />
</td>
</tr>
<tr>
<td style="vertical-align: top;">
<table border='0' cellspacing='0' style='margin: 0px;'>
<tr>
<td>
<img src='/images/icons/world.png' alt='' border='0'>
</td>
<td>
&nbsp;Start in:
</td>
</tr>
</table> </td>
<td>
&nbsp;<select name='land'>
<?php
foreach($landen AS $id => $land)
{
echo "<option value='".$id."'>".$land."</option>";
}
?>
</select><br />
</td>
</tr>
<tr>
<td style="vertical-align: top;">
<table border='0' cellspacing='0' style='margin: 0px;'>
<tr>
<td>
<img src='/images/icons/database_gear.png' alt='' border='0'>
</td>
<td>
&nbsp;Code:
</td>
</tr>
</table> </td>
<td>
<img src='IMG/captcha.php' alt='' border="0" /> <input type='text' name='code' style='width: 70px;' maxlength='4'/> </td>
</tr>
<tr>
<td colspan="2">
er zijn bekende problemen met google chrome,gebruik IE of firefox <br />
<input type="submit" name="submit_register" value="Registreren" />
</td>
</tr>
</table>

</form>
</div>
<div id="content-bottom">
</div>
<?
}
?>
</body>
</html>