This experimental project is not maintained, actually has never grown to stable quality.

The excellent OpenPGP.js project (https://github.com/openpgpjs/openpgpjs) is mature and recommended implementation.

JsPG: a javascript OpenPGP implementation

java -jar JsTestDriver-1.3.2.jar --browser firefox,chromium-browser --port=9876 java -jar JsTestDriver-1.3.2.jar --tests all --testOutput=results