Some while ago, the functionality of Java was changed so that old things can't be made to work even if you want them to. (At least as far as I can tell, and I did a lot of looking.)
Which ticks me off the most because of the old chess applets at the Chess Variant Pages, because some of those were really fun.
On the other hand, there's now Jocly.com, a weirdly named site that lets you play plenty of board games, including xiangqi, which is something of a drug for me**.
And it's a lot prettier than the old applets, I'll give it that, even if it doesn't have a tenth of the variety. (Big missing example: No shogi. Y U NO SHOGI, JOCLY? More understandable missing example: Yitong [see below footnote link], which isn't much of a game because one and only one side has a rook/cannon/quasi-knight composite piece that can go anywhere and kill everything.)
*I know that janggi does, but the elephants in that game make me incredibly furious, so they don't count.***
**It's the cannons. It's always been and will always be the cannons.
***Also the cannons in janggi just aren't fun the same way the xiangqi cannons are.