jQuery provides many general function to build a rich pages. jQuery feature:

• Ajax
  jQuery is one of the ajax framework that used mostly by many web master.
• Shortcut access to DOM
  instead of using bulk of code in accessing DOM, jQuery have the shortcut.
• Manipulating the element content
  With jQuery, we can freely insert, update and delete every HTML element.
• Easy event handling
  Event handling is no fear again in web pages, jQuery make the process simple.
• Animation
  by default, jQuery already have ability to perform general animation on the pages.
• Action Chaining
  Instead of using many temporary variable and repetition lines, we can easily unite several lines of code that have same characteristic to a line code with chaining.
• CSS Compliance
  The jQuery selector is CSS Compliance, that make any designer that already have knowledge about CSS is able to learn jQuery easily.
• Cross browser
  using jQuery, no more hack for IE… the framework has done it automatically.

jQuery is created by John Resig, it is a powerful JavaScript library that can rock and enhance your websites. jQuery is provides very wide range of features, easy-to-use syntax, and great cross-platform compatibility in a single file.

Another jQuery superiority is it has thousands of plugin that developed to extend jQuery’s functionality, the plugin make jQuery as an essential tool. Mastering jQuery allow you to add attractive interactions and animations to your web with AJAX, events, effects, and advanced JavaScript language features.

Ajax Framework grows together with Ajax popularity that is growing fast in this several years. That makes JavaScript is being used widely and more common on more websites. but most of programmer feel that JavaScript is a nightmare, because it’s unstructured, learning javascript is always hard for most of programmer.

What Ajax Framework do is simplifying the use of JavaScript, make JavaScript more structured, programmable, understoodable and reuseable. The framework work as a layer for Javascript, make it like a new simple and powerfull programming language.

There is many choices of ajax framework out there available for free to use. The most popular framework are prototype, jQuery, dojo, mootools, Yahoo UI (YUI) and Google Web Toolkit (GWT). There is no best ajax framework. every framework is best if we use it wisely and every framework is worst if we use it badly. Each framework have a different style.