Button Object
按钮对象

The Button object represents a button in an HTML form. For each instance of an <input type="button"> tag in an HTML form, a Button object is created.
按钮对象可以代表在HTML表单中的按钮。每当HTML表单中有<input type="button">标签，一个按钮对象就建立起来了

You can access a Button object by indexing the elements array (by number or name) of the corresponding form or by using getElementById().
你可以通过使用getElementById()或是表单元素数组的数字或是名称来访问按钮对象。

IE: Internet Explorer, F: Firefox, N: Netscape, W3C: World Wide Web Consortium (Internet Standard).

Button Object Properties
按钮对象属性

Property 属性	Description 描述	IE	F	O	W3C
accessKey	Sets or returns the keyboard key to access a button 设置或返回可访问按钮的键盘键	5	1	9	Yes
disabled	Sets or returns whether or not a button should be disabled 设置或返回按钮是否可用	5	1	9	Yes
form	Returns a reference to the form that contains the button 为包含按钮的表单返回一份参考	4	1	9	Yes
id	Sets or returns the id of a button 设置或返回按钮的id	4	1	9	Yes
name	Sets or returns the name of a button 设置或返回按钮的name	4	1	9	Yes
tabIndex	Sets or returns the tab order for a button 设置或返回按钮统计表	5	1	9	Yes
type	Returns the type of form element a button is 返回表单中按钮类型	4	1	9	Yes
value	Sets or returns the text that is displayed on the button 设置或返回按钮文字是否显示	4	1	9	Yes

Standard Properties
标准属性

Property 属性	Description 描述	IE	F	O	W3C
className	Sets or returns the class attribute of an element 设置或返回元素的class属性	5	1	9	Yes
dir	Sets or returns the direction of text 设置或返回文字方向	5	1	9	Yes
lang	Sets or returns the language code for an element 设置或返回元素的代码语言	5	1	9	Yes
title	Sets or returns an element's advisory title 设置或返回元素的咨询标题	5	1	9	Yes

Button Object Methods
按钮对象方法

Method 方法	Description 描述	IE	F	O	W3C
blur()	Removes focus from a button 删除对按钮的聚焦	4	1	9	Yes
click()	Simulates a mouse-click on a button 模仿鼠标点击	4	1	9	Yes
focus()	Gives focus to a button 聚焦到按钮上	4	1	9	Yes

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