### 返回值:jQuerymouseleave([[data],fn])
### 概述
当鼠标指针离开元素时，会发生 mouseleave 事件。该事件大多数时候会与mouseenter 事件一起使用。
与 mouseout 事件不同，只有在鼠标指针离开被选元素时，才会触发 mouseleave 事件。如果鼠标指针离开任何子元素，同样会触发 mouseout 事件。
### 参数
#### **fn**Function*V1.0*
在每一个匹配元素的mouseleave事件中绑定的处理函数。
#### **[data],fn**String,Function*V1.4.3*
**data**:mouseleave([Data], fn) 可传入data供函数fn处理。
**fn**:在每一个匹配元素的mouseleave事件中绑定的处理函数。
### 示例
#### 描述:
当鼠标指针离开元素时，改变元素的背景色：：
##### jQuery 代码:
~~~
$("p").mouseleave(function(){
$("p").css("background-color","#E9E9E4");
});
~~~
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