@tiaan
Thanks so much for the reply! It sounds very simple! Yet, being an absolute total rookie, I can’t figure it out. The past 2 hours I spend trying to implement the code, zero result.
I got the new page (name: cohesiefoto). Then I added the onClick handler button and the input box. I placed those on my homepage. And then I placed the code where I think it should be. And then I guess I need to write in the name of the new page somewhere along the code, but where? 
This is what I got so far: (I don’t know what lines 4 till 7 are)
