Thank you for that.
For now, we will almost certainly not attempt to deliver this, and only do static or semi-static webpages, though given that there seems to be a 100 page limit I probably have to crack dynamic pages. It is not that I am out of my comfort zone per se, but at this stage of the project, learning to code in a language that I do not know (hey, I don’t even know the name of it) to try to deliver this functionality, is much less important than getting the rest of the site up and running. I did write javascript to get my last website up and running, but that was over 20 years ago, and I did that through copy and hack.
As some stage in the future, I am likely to revisit this, hopefully with a tame (but free!) friend of a friend who can point me in the right direction.