jQuery is one of the most popular JavaScript library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development. Today the jQuery team have just released jQuery version 1.4 to developers to celebrate their 4th birthday. Web designers and developers can now download or learn more about jQuery 1.4. jQuery 1.4 is also available as part of Google Ajax APIs. jQuery 1.4 comes with tons of new features and functions:

• Performance Overhaul of Popular Methods – jQuery developers have rewritten code for most of the earlier functions to provide with significant performance gains;
• East Setter Functions – added new and easy setter functions for all the objects;
• Improvements in Ajax – introduces several significant updates to Ajax and JSON handling.
• http://jquery14.com/