jQuery 1.4 Released ( jQuery 1.4 发布)

In celebration of jQuery’s 4th birthday, the jQuery team is pleased to release the latest major release of the jQuery JavaScript library! A lot of coding, testing, and documenting has gone into this release, and we’re really quite proud of it.

I want to personally thank Brandon Aaron, Ben Alman, Louis-Rémi Babe, Ariel Flesler, Paul Irish, Robert Katić, Yehuda Katz, Dave Methvin, Justin Meyer, Karl Swedberg, and Aaron Quint who put a lot of work into fixing bugs and getting the release out the door. 

http://jquery14.com/day-01/jquery-14

Performance Overhaul of Popular Methods

Easy Setter Functions

Ajax

JSON and script types auto-detected by content-type

Etag support has been added 

Strict JSON parsing, using native JSON.parse

Serialize HTML5 elements

Context for Ajax Request

Success callback receives XHR object as third argument

Explicitly set a content-type

Explicitly specify a JSONP callback name

Avoid pre-flighting cross-domain XHR

jQuery.ajax() is now using onreadystatechange instead of a timer