//////////////////
//    BANNER    //
//////////////////
elseif($_GET['cmd'] == "server_upload_banner" && $_SESSION['loginusername'] && $_SESSION['myid']) {
    $newname = uniqid("whc").".gif";
    move_uploaded_file($_FILES['img']['tmp_name'], "img/upload/".$newname."");
    $img="img/upload/".$newname."";
    list($sirka, $vyska, $typ, $atributy) = getimagesize($img);
    if($sirka=="nieco") {
        echo'   <blockquote><p style="color:red">CHYBA: Ikonka nemá správne rozmery.</p></blockquote>';
        $img="";
    }
}