Javascript library & relative soruce

I introduce some javascript libraries on the internet.

The Yahoo! User Interface Library (YUI)
http://developer.yahoo.com/yui/

Dojo

http://dojotoolkit.org/

JSLint :

http://www.jslint.com/

Packer / Javascript compressor :

http://dean.edwards.name/packer/

Jsmin / Javascript compressor :

http://www.crockford.com/javascript/jsmin.html