Hello Hello, recently (3 october 2016) dropbox has discontinued the webserver service, but i saw on cow_trix plugin page that the demo still works for him, but only for him!
every other dropbox html page seems to be dead.
i would like to ask directly him how he did (maybe he paid for?), but he's not online from 12 months or so.
the demo is here http://dl.dropbox.com/u/1378330/RandomPlus/RandomPlus%20Example/index.html