1. defferred对象

实现链式回调函数编程。

http://www.ruanyifeng.com/blog/2011/08/a_detailed_explanation_of_jquery_deferred_object.html

• def.done(d,[d])
• def.fail(failCallbacks)
• def.isRejected()^1.8-
• def.isResolved()^1.8-
• def.reject(args)
• def.rejectWith(c,[a])
• def.resolve(args)
• def.resolveWith(c,[a])
• def.then(d,f,[,p])^1.7*
• def.promise([ty],[ta])
• def.pipe([d],[f],[p])^1.7*
• def.always(al,[al])
• def.notify(args)^1.7+
• def.notifyWith(c,[a])^1.7+
• def.progress(proCal)^1.7+
• def.state()^1.7+

• cal.add(callbacks)^1.7+
• cal.disable()^1.7+
• cal.empty()^1.7+
• cal.fire(arguments)^1.7+
• cal.fired()^1.7+
• cal.fireWith([c] [,a])^1.7+
• cal.has(callback)^1.7+
• cal.lock()^1.7+
• cal.locked()^1.7+
• cal.remove(callbacks)^1.7+
• $.callbacks(flags)^1.7+

【jquery】ajax请求