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DOM Input Hidden对象 
Hidden 对象
The Hidden object represents a hidden field in an HTML form. For each instance of an <input type="hidden"> tag in an HTML form, a Hidden object is created.
当HTML表单中出现<input type="hidden">标签就意味着Hidden对象建立起来了
You can access a Hidden object by indexing the elements array (by number or name) of the corresponding form or by using getElementById().
你可以根据表单使用元素数组索引(数字或是名称)或者使用getElementById()来访问Hidden对象。
IE: Internet Explorer, F: Firefox, N: Netscape, W3C: World Wide Web Consortium (Internet Standard).
Hidden 对象属性
| Property 属性 |
Description 描述 |
IE | F | N | W3C |
|---|---|---|---|---|---|
| defaultValue | Sets or returns the initial value of the hidden field 设置或返回hidden field的初始值 |
3 | 1 | 2 | Yes |
| form | Returns a reference to the hidden field's parent form 返回hidden field父表单的参考 |
3 | 1 | 2 | Yes |
| id | Sets or returns the id of the hidden field (In IE 4 this property is read-only) 设置或返回hidden field的id |
4 | 1 | No | |
| name | Sets or returns the name of the hidden field 设置或返回hidden field的name |
3 | 1 | 2 | Yes |
| type | Returns the type of the form element. For a hidden object it will always be "hidden" 返回表单里的元素类型。hidden对象就显示"hidden" |
4 | 1 | 3 | Yes |
| value | Sets or returns the value of the value attribute of the hidden field 设置或返回hidden field的value属性值 |
3 | 1 | 2 | Yes |
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