Zooming photo, but no horizontal scroll bar

Hi,

I make some hack in wppa.js to force the image size to be larger than the screen size. I can see the image is magnified and vertical scroll bar is also updated. However, there is still no horizontal scroll bar. I am not javascript expert, is there any trick in it?

Thanks very much.

Jacky

https://www.ads-software.com/extend/plugins/wp-photo-album-plus/