function llLocateTimezone ( $lat, $long, $tzInfo, $ctry='' )
        {
#-k     geo
#-       given lat & long, find the tz from the global tzInfo array
#-              (loaded from JSON array in 'timezoneData.js')
        $d = 9999999;

        foreach ($tzInfo as $key => $tz)
                {
                if (strlen($ctry))
                        {
                        if ($tz['cc'] == $ctry)
                                {
                                $dist[$key] = llDistance ( $lat, $long, $tz['lat'], $tz['lon'] );
                                if ($dist[$key] < $d)
                                        {
                                        $d = $dist[$key];
                                        $dk = $key;
                                        }
                                }
                        }
                else
                        {
                        $dist[$key] = llDistance ( $lat, $long, $tz['lat'], $tz['lon'] );
                        if ($dist[$key] < $d)
                                {
                                $d = $dist[$key];
                                $dk = $key;
                                }
                        }
                }

        return $dk;
        }

?>