function addPolyLineByAddress($address1,$address2,$id=false,$color='',$weight=0,$opacity=0) {
        if(($_geocode1 = $this->getGeocode($address1)) === false)
            return false;
        if(($_geocode2 = $this->getGeocode($address2)) === false)
            return false;
        return $this->addPolyLineByCoords($_geocode1['lon'],$_geocode1['lat'],$_geocode2['lon'],$_geocode2['lat'],$id,$color,$weight,$opacity);
    }