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DOM Input Checkbox 
Checkbox 对象
The Checkbox object represents a checkbox in an HTML form. For each instance of an <input type="checkbox"> tag in an HTML form, a Checkbox object is created.
Checkbox对象可代表一个HTML表单中的checkbox(复选框)。每当有<input type="checkbox">标签出现在HTML表单，一个Checkbox对象就建立起来了。
You can access a Checkbox object by indexing the elements array (by number or name) of the corresponding form or by using getElementById().
你可以通过元素数组索引或是使用getElementById()来访问Checkbox对象。
IE: Internet Explorer, F: Firefox, N: Netscape, W3C: World Wide Web Consortium (互联网标准).
Checkbox 对象属性
| Property 属性 |
Description 描述 |
IE | F | N | W3C |
|---|---|---|---|---|---|
| accept | Sets or returns a list of content types, which the server processing this form will handle correctly 设置或返回内容的类型，让服务器更准确的处理这个表单 |
- | Yes | ||
| accessKey | Sets or returns the keyboard key to access the checkbox 设置或返回能够访问这复选框的键盘按键。 |
4 | Yes | ||
| align | Sets or returns the alignment of the checkbox according to the surrounding text 设置或返回复选框相对周围文字的对齐方式 |
- | Yes | ||
| alt | Sets or returns an alternate text to display if the browser does not support checkboxes 设置或返回对于那些无法支持checkbox浏览器的替换文字。 |
- | Yes | ||
| checked | Sets or returns whether or not the checkbox is checked 设置或返回checkbox是否被选中了 |
3 | 1 | 2 | Yes |
| defaultChecked | Sets or returns the default value of the checked attribute (true if checked by default and false if not) 设置或返回被选中属性的默认值（被默认的选中则为真，不然则为假） |
3 | 1 | 2 | Yes |
| disabled | Sets or returns whether or not the checkbox should be disabled 设置或返回复选框是否应该禁用。 |
3 | 1 | Yes | |
| form | Returns a reference to the form that contains the checkbox 返回包含checkbox表单的参考 |
3 | 1 | 2 | Yes |
| id | Sets or returns the id of the checkbox (In IE 4 this property is read-only) 设置或返回checkbox的id(在IE4中这个属性只读) |
4 | 1 | No | |
| name | Sets or returns the name of the checkbox 设置或返回checkbox的name |
3 | 1 | 2 | Yes |
| tabIndex | Sets or returns the index that defines the tab order for the checkbox 设置或返回checkbox由tab顺序所定义的索引 |
4 | Yes | ||
| type | Returns the type of the form element. For a checkbox it will be "checkbox" 返回表单元素类型，是checkbox的话就会返回为"checkbox" |
4 | 1 | 3 | Yes |
| value | Sets or returns the value of the value attribute of the checkbox 设置或返回checkbox属性的值 |
3 | 1 | 2 | Yes |
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 |
Checkbox 对象方法
| Method 方法 |
Description 描述 |
IE | F | N | W3C |
|---|---|---|---|---|---|
| blur() | Removes focus from the checkbox 删除checkbox的焦距 |
3 | 1 | 2 | Yes |
| click() | Simulates a mouse-click in the checkbox 在checkbox中模仿鼠标点击 |
3 | 1 | 2 | Yes |
| focus() | Gives focus to the checkbox 为checkbox加上聚焦 |
3 | 1 | 2 | Yes |
Checkbox Object Events
checkbox对象事件
Syntax: object.event_name="someJavaScriptCode"
语法：对象.事件名 = "一些js代码"
| Event 事件 |
Description 描述 |
IE | F | N | W3C |
|---|---|---|---|---|---|
| onBlur | Executes some code when the checkbox loses focus 当checkbox失去聚焦的时候执行一些代码 |
3 | 1 | 2 | |
| onClick | Executes some code when the checkbox is clicked 当checkbox被点的时候执行一些代码 |
3 | 1 | 2 | |
| onFocus | Executes some code when the checkbox gets focus 当checkbox得到聚焦的时候执行一些代码 |
3 | 1 | 2 | |
| onMouseDown | Executes some code when a mouse button is pressed 当鼠标按钮按住的时候执行一些代码 |
4 | 1 | 4 | |
| onMouseUp | Executes some code when a mouse button is released 当鼠标按钮释放的时候执行一些代码 |
4 | 1 | 4 |
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