if (s !== null, if (startscene === null, set(startscene, get(s));); ); if (startscene === null, set(startscene, pano16); ); mainloadscene(get(startscene)); if (h !== null, if (v !== null, if (f !== null, lookat(get(h), get(v), get(f)); , lookat(get(h), get(v)); ); ); );