TextEdit, on the Mac, and I just got it to work. (For posterity: Turn on “Ignore rich text commands in HTML files” in the Open and Save tab of the preferences. Opening it with the rich text commands on and converting to plain text doesn’t work.) This means I’ll probably finish sooner than I’d thought, though the deadline is right out.
If your Javascript is rudimentary and decayed, that means you’ve forgotten more of it than I know. (For instance.)
…I don’t need to understand CSS if I don’t want to modify the default look (besides the font color), do I?