Prototype.js and script.aculo.us lib for JavaScript

For all those who are new to JavaScript and want to get working knowledge of JavaScript for form validation, Ajax functionality and others can learn these two JavaScript libraries. These two are working with each other. Prototype.js is base library for script.aculo.us. Prototype provides all the necessary functionalities for your JavaScript works. Script.aculo.us adds more functionality related to visual effects. These kind of libraries are becoming essential these day. Day by day JavaScript's popularity is increasing.