The typical HTML/HTTP solution is:

    <a href = "spoiler.html">Spoiler</a>
[download]

The typical Usenet solution is ^L, for which there is no HTML equivalent. The other Usenet solution is a bunch of blank lines, which in HTML is easily simulated with a large, blank, <pre> section.

Personally, I think all this "spoiler" business is a nuisance. If I don't want to read the spoiler, I don't.

Abigail