### 返回值:jQueryfadeToggle([speed,[easing],[fn]])
### 概述
通過不透明度的變化來開關所有匹配元素的淡入和淡出效果，并在動畫完成后可選地觸發一個回調函數。
這個動畫只調整元素的不透明度，也就是說所有匹配的元素的高度和寬度不會發生變化。
### 參數
#### **speed[,fn]**Number/String,Function*V1.0*
**speed**:三種預定速度之一的字符串("slow","normal", or "fast")或表示動畫時長的毫秒數值(如：1000)
**fn**:在動畫完成時執行的函數，每個元素執行一次。
#### **[speed],[easing],[fn]**Number/String,String,Function*V1.4.4*
**speed**:三種預定速度之一的字符串("slow","normal", or "fast")或表示動畫時長的毫秒數值(如：1000)
**easing**:(Optional) 用來指定切換效果，默認是"swing"，可用參數"linear"
**fn**:在動畫完成時執行的函數，每個元素執行一次。
### 示例
#### 描述:
用600毫秒緩慢的將段落淡入
##### jQuery 代碼:
~~~
$("p").fadeToggle("slow","linear");
~~~
#### 描述:
用200毫秒快速將段落淡入，之后彈出一個對話框
##### jQuery 代碼:
~~~
$("p").fadeToggle("fast",function(){
alert("Animation Done.");
});
~~~
- 速查表
- 核心
- jQuery(selector,[context])
- jQuery(html,[ownerDocument])
- jQuery(callback)
- jQuery.holdReady(hold)
- each(callback)
- size()
- length
- selector
- context
- get([index])
- index([selector|element])
- data([key],[value])
- removeData([name|list])
- jQuery.data(element,[key],[value])
- queue(element,[queueName])
- dequeue([queueName])
- clearQueue([queueName])
- jQuery.noConflict([extreme])
- 選擇器
- #id
- element
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- *
- selector1,selector2,selectorN
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- blur([[data],fn])
- change([[data],fn])
- click([[data],fn])
- dblclick([[data],fn])
- error([[data],fn])
- focus([[data],fn])
- focusout([data],fn)
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- keypress([[data],fn])
- keyup([[data],fn])
- mousedown([[data],fn])
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- mousemove([[data],fn])
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- mouseup([[data],fn])
- resize([[data],fn])
- scroll([[data],fn])
- select([[data],fn])
- submit([[data],fn])
- unload([[data],fn])
- 效果
- show([speed,[easing],[fn]])
- hide([speed,[easing],[fn]])
- slideDown([speed],[easing],[fn])
- slideUp([speed,[easing],[fn]])
- slideToggle([speed],[easing],[fn])
- fadeIn([speed],[easing],[fn])
- fadeOut([speed],[easing],[fn])
- fadeTo([[speed],opacity,[easing],[fn]])
- fadeToggle([speed,[easing],[fn]])
- animate(param,[spe],[e],[fn])
- stop([cle],[jum])
- delay(duration,[queueName])
- jQuery.fx.off
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- Ajax
- jQuery.ajax(url,[settings])
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- def.then(doneCal,failCal)
- def.progress([type],[target])
- def.pipe([donFil],[faiFil],[proFil])
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- def.notify(args)
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- def.state()
- Callbacks
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- 關于
- 關于jQuery API 文檔
- 提交bug及獲取更新
- 其它
- HTML5速查表
- 正則表達式速查表