Puzzle OnSite Version 2.5 created by Xin Yang ... and me :-)
I think Xin Yang did a fine job creating this wonderful puzzle. The last update of Puzzle OnSite was done by Xin in 2002. Unfortunately he totally dropped out of sight shortly afterwards. Version 2.4 still runs in MSIE, but not in any other browser. Main reason was Xin's old browser check, supporting only MSIE and two NN versions. Fortunately, the DOM-Code for the old N6 browser works fine together with the other lot, only MSIE needs some extra coding.
Well, the dropdown menu was my idea, but after all it's still Xin's child.
Here's the link to the puzzle:
Xin Yang Puzzle Version 2.4
Regards
Karlheinz Zahneißen