                           .addService(googletag.pubads());
sizeMappings['adpos_rightB'] = googletag.sizeMapping()
                                              .addSize([1024, 200], [[300, 600], [3,2]]) //Desktop
                                              .addSize([768, 200], [300, 250]) //Tablet
                                              .addSize([500, 0], [[320, 100], [320, 50]]) //Mobile
                                              .build();
                                          gptAdSl