Hi - my website is mostly complete but my programmer just bailed on me so I'm trying to complete the last items myself. I have the nextgen gallery plugin. My programmer created complex javascript that I don't understand, and I'm trying to increase the size of the thumbnail images on this page:http://photographprose.com/up-exhibit/

Can anyone look at the source code and see how I might change this?

did you check the NextGen options in the backend. I seem to remember there is a size definition is one of the options.

I checked that but when I change it there's no difference. I think this is because my programmer set this page up in a separate php file and I can't find the code in that file to determine the thumbnail size. I think that's where I need to change it. Can you help?

After you change the thumbnail size in NextGen you have to create new thumbnails per the dialog in Gallery>Manage gallery as in this screenshot.