How to use closure compiler to compress cocos2d engine and also my game source code.

Hello,

I came to know about google closure compiler.
I want to compress the game files and cocos2d engine files .
I opened the link in the tools folder ,but
it is not functioning.

http://www.cocos2d-x.org/projects/cocos2d-x/wiki/Closure_Compiler

can any one help?