function RemoveVariable ($url, $var, $value = '')
    {
        if ($value == '') {
            $newurl = eregi_replace("$var=[^&]*", '', $url);
        } else {
            $newurl = str_replace($var . '=' . $value, '', $url);
        }
        $newurl = trim($newurl, '&?');
        $trans = array('&&' => '&' , '?&' => '?');
        $newurl = strtr($newurl, $trans);
        return $newurl;
    }