This comes under the category of COOL TOOLS. I'm not sure what purpose a tool like this has other than to just be fun, and when is that ever wrong. It has the added bonus of reminding me of a Diana Ross song . . . upside down, boy you turn me inside out and round and round.
http://www.sevenwires.com/play/UpsideDownLetters.html
Go check it out and send someone and upside down and backwards message.
It occurs to me that much of my communication is tumbled just like that, with no help from JavaScript!
Just Sharin'
Lee Anne