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JavaScript onmousemove 事件


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Definition and Usage
定义与用法

The onmousemove event occurs when the mouse pointer is moved.
当鼠标移动时触发onmousemove事件

Syntax
语法

onmousemove="所要执行的代码"

Parameter
参数
Description
注释
SomeJavaScriptCode
所要执行的代码
Required. Specifies a JavaScript to be executed when the event occurs.
必选项。当事件触发时所要执行的代码

Supported by the following HTML tags:
所支持的HTML标签:

<a>, <address>, <area>, <b>, <bdo>, <big>, <blockquote>, <body>, <button>, <caption>, <cite>, <code>, <dd>, <dfn>, <div>, <dl>, <dt>, <em>, <fieldset>, <form>, <h1> to <h6>, <hr>, <i>, <img>, <input>, <kbd>, <label>, <legend>, <li>, <map>, <ol>, <p>, <pre>, <samp>, <select>, <small>, <span>, <strong>, <sub>, <sup>, <table>, <tbody>, <td>, <textarea>, <tfoot>, <th>, <thead>, <tr>, <tt>, <ul>, <var>

Supported by the following JavaScript objects:
所支持的JavaScript对象:

onmousemove is, by default, not an event of any object, because mouse movement happens very frequently.
onmousemove在默认情况下不是任何一个对象的事件,因为鼠标是频繁移动的。


Tips and Notes
注意

Note: Each time a user moves the mouse one pixel, a mousemove event occurs. It takes system resources to process all mousemove events. Use this event carefully!
注意:当用户鼠标移动一像素时,就会触发一次mousemove事件。这将非常消耗系统的资源,请谨慎使用。


Example
实例

In the following example we will display an alert box when the user moves the mouse pointer over the image:
在下面的例子中,当用户的鼠标在图片上移动时将弹出一个消息框:

<img src="image_w3default.gif" alt="RuanChen"
onmousemove="alert('RuanChen!')" />

The output of the code above will be:
输出结果为:

RuanChen


Try-It-Yourself Demos
互动演示

onmousemove
How to use onmousemove.
如何应用onmousemove

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