Redirect with POST params

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <script type="text/javascript">
        function closethisasap() {
            document.forms["redirectpost"].submit();
        }
    </script>
</head>
<body onload="closethisasap();">
<form name="redirectpost" method="post" action="http://okkio.org/">
    <?php
    if ( !is_null($_GET) ) {
        foreach ($_GET as $k => $v) {
            echo '<input type="hidden" name="' . $k . '" value="' . $v . '"> ';
        }
    }
    ?>
</form>
</body>
</html>