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DOM Input Password 对象 
Password 对象
The Password object represents a password field in an HTML form. For each instance of an HTML <input type="password"> tag on a form, a Password object is created.
当HTML表单中含有<input type="password">标签就意味着Password对象建立起来了
You can access a Password object by indexing the elements array (by number or name) of the corresponding form or by using getElementById().
你可以根据表单的元素组索引数或名称来访问Password对象，也可以使用getElementById()来访问
IE: Internet Explorer, F: Firefox, N: Netscape, W3C: World Wide Web Consortium (Internet Standard).
Password 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 设置或返回内容类型列表，服务器可以更准确的处理这个表单 |
- | Yes | ||
| accesskey | Sets or returns the keyboard key to access the password field 设置或返回可以访问password field的键盘按键。 |
4 | Yes | ||
| defaultValue | Sets or returns the initial value of the password field 设置或返回password field的初始值 |
3 | 1 | 2 | Yes |
| disabled | Sets or returns whether or not the password field should be disabled 设置或返回password field是否可用 |
5 | 1 | 6 | Yes |
| form | Returns a reference to the password field's parent form 返回password field的父表参考 |
3 | 1 | 2 | Yes |
| id | Sets or returns the id of the password field (In IE 4 this property is read-only) 设置或返回password field的id |
4 | 1 | No | |
| maxLength | Sets or returns the maximum number of characters the user can enter in the password field 设置后返回password field里可输入的最大限度字符数 |
4 | 1 | 6 | Yes |
| name | Sets or returns the name of the password field 设置或返回password field的name |
3 | 1 | 2 | Yes |
| readOnly | Sets or returns whether the content of the password field is read-only 设置或返回password field里的内容为只读 |
4 | 1 | 6 | Yes |
| size | Sets or returns the size of the password field 设置或返回password field的大小 |
3 | 1 | 6 | Yes |
| tabIndex | Sets or returns the index that defines the tab order for the password field 设置或返回password field的tab顺序 |
4 | Yes | ||
| type | The type of the form element. For a password object it will always be "password" 表单元素类型。password 对象就显示为"password" |
3 | 1 | 3 | Yes |
| value | Sets or returns the value of the value attribute of the password field 设置或返回password field的value属性值 |
3 | 1 | 2 | Yes |
Password 对象方法
| Method 方法 |
Description 描述 |
IE | F | N | W3C |
|---|---|---|---|---|---|
| blur() | Removes focus from the password field 取消对password field的聚焦 |
4 | 1 | 2 | Yes |
| click() | Simulates a mouse-click on the password field 模拟鼠标点击password field |
4 | 1 | No | |
| focus() | Sets focus on the password field 让password field获得聚焦 |
3 | 1 | 2 | Yes |
| select() | Selects and highlights the entire text that is in the password field 选中password field里的文字并且显示高亮 |
4 | 1 | 2 | Yes |
Password 对象事件
Syntax: object.event_name="someJavaScriptCode"
语法：对象.事件名称="一些JS代码"
| Event 事件 |
Description 描述 |
IE | F | N | W3C |
|---|---|---|---|---|---|
| onBlur | Executes some code when the password field loses focus 当password field失去聚焦的时候执行代码 |
4 | 1 | 2 | |
| onClick | Executes some code when the user clicks in the password field 当用户点击password field的时候执行代码 |
4 | |||
| onFocus | Executes some code when the password field gets focus 当password field得到聚焦的时候执行一些代码 |
3 | 1 | 2 | |
| onKeyDown | Executes some code when a key is pressed down in the password field 当在password field中按住某键的时候执行代码 |
4 | 1 | 4 | |
| onKeyPress | Executes some code when an alphanumeric key is pressed in the password field 当在password field中按下并释放某键的时候执行一些代码 |
4 | 1 | 4 | |
| onKeyUp | Executes some code when a key is released in the password field 当在password field中释放某键的时候执行一些代码 |
4 | 1 | 4 | |
| onSelectStart | Executes some code when some text in the password field is selected 当password field中的文字选中时执行一些代码 |
4 |
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