var opt = {};
                opt["adv_type"] = 'graphic';
                opt["dim"] = {width: '728px', height: '90px'};
                opt["img_url"] = 'https://optimized-by.4wnetwork.com/image/noads/en/728x90.jpg';
                opt["endpoint_viewability"] = '';
                opt["click_tag"] = '';
                opt["fc_url"] = '';
                opt["campaign_id"] = '';