I had success with JavaScript 10 years ago: (jeffa) Re: Encrypt web files!. The only hint that i gave then was ensuring you had the right Javascript libs installed ...

For example, when i try to install JavaScript now, i see that Makefile.PL fails to create a makefile because the jsapi.h header is not found. Perhaps you don't have the necessary files installed ...

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)