JavaScript parser, compressor, mangler (minifier) / beautifier toolkit.
http://lisperator.net/uglifyjs
http://skalman.github.io/UglifyJS-online/
Should you switch to UglifyJS2?
http://lisperator.net/blog/should-you-switch-to-uglifyjs2/
http://github.com/mishoo/UglifyJS2
origin - http://www.pipiscrew.com/?p=3279 js-uglifyjs