### 返回值:jQuerymouseover([[data],fn])
### 概述
在每一个匹配元素的mouseover事件中绑定一个处理函数。
mouseover事件会在鼠标移入对象时触发
### 参数
#### **fn**Function*V1.0*
在每一个匹配元素的mouseover事件中绑定的处理函数。
#### **[data],fn**String,Function*V1.4.3*
**data**:mouseover([Data], fn) 可传入data供函数fn处理。
**fn**:在每一个匹配元素的mouseover事件中绑定的处理函数。
### 示例
#### 描述:
当鼠标指针位于元素上方时时，改变元素的背景色：
##### jQuery 代码:
~~~
$("p").mouseover(function(){
$("p").css("background-color","yellow");
});
~~~
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