Java and javascript are two different languages.
They are both difficult to parse but they can be downloaded
most of the time.
In your case it semms that javascript is involved. It calls
a routine that may compute the full path.
I'm not sure that the default options will mirror the images.
If you have the full path  by visiting the site, adding
rules in the scan rules box will allow you to download the
images.
You may have extra work if the routine targetNewWindow is
tricky.