If you are new to MooTools, and need a guide to help you along the way, I recommend you to check out MooTools documentation. The documentation is extensive and it includes
- Core Moo.js (Classes/Objects)
- Extensions to native JS objects
- Add ons such as Color.js, Common.js, Dom.js, and Hash.js
- Visual Effects
- Drag and Drop
- Remote Access
- Plugins/Widgets such as Accordian, Scroller, Slider, and Tips
- Compatibility information (1.0 isn’t 100% backwards compatible with old versions)
- Debugger wrapper that uses Firebug if possible
Mootools is released with the Open Source MIT license, which permits you to use it and modify it in every scenario.
Overall MooTools makes your life a lot more easier and your coding style way cooler.