Encoded JScript

Do you use the language attribute on the script element? If so,
bear in mind that one possible value is JScript.Encode. Nothing particularly odd
about that until you look at the part after the dot. It means the client-side script
inside the tag with that attribute is encrypted. If you’re at least as
surprised as I am, read what
Yuhů found out about this little-known feature in Encoded JavaScript.