jQuery is a fast, concise, JavaScript Library that simplifies how you traverse HTML documents, handle events, perform animations, and add Ajax interactions to your web pages.
mootools is a very compact, modular, Object-Oriented javascript framework. Its unique design makes it extremely crossbrowser, easy to use, and a snap to extend with your own code. It comes with a choice of more than fifteen scripts, plugins and add-ons, i
jQuery is a new type of Javascript library. It is not a huge, bloated framework promising the best in AJAX - nor is it just a set of needlessly complex enhancements - jQuery is designed to change the way that you write Javascript. What is jQuery?