var context = new SP.ClientContext.get_current();
            var web = context.get_web();
            web.set_masterUrl('/sites/intranet2/_catalogs/masterpage/oslo.master');
            web.set_siteLogoUrl('/sites/intranet2/Style%20Library/images/Contoso-Blue.png');
            web.set_alternateCssUrl('/sites/intranet2/Style%20Library/CSS/Contoso.Intranet3.css');
            web.update();
            context.executeQueryAsync(onQuerySucceeded, onQueryFailed);