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HTML DOM 中的 DOM Textarea 对象


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Textarea 对象

The Textarea object represents a text-area in an HTML form. For each instance of an HTML <textarea> tag in a form, a Textarea object is created.
Textarea对象代表了HTML表单中的文字区域。每当表单中出现<textarea>标签就意味着建立了Textarea对象

You can access a Textarea object by indexing the elements array (by number or name) of the corresponding form or by using getElementById().
你可以使用索引元素数组的索引数或是名称来访问Textarea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).

Textarea 对象属性

Property
属性
Description
描述
IE  F N W3C
accessKey Sets or returns the keyboard key to access the textarea
设置或返回访问textarea的快捷键
4     Yes
cols Sets or returns the width (in characters) of the textarea
设置或返回textarea的宽度(用每行可容纳的文字数来做依据)
3 1 6 Yes
defaultValue Sets or returns the initial contents of the textarea
设置或返回textarea初始内容
3     Yes
disabled Sets or returns whether or not the textarea should be disabled
设置或返回textarea的状态
5 1 6 Yes
form Returns a reference to the textarea's parent form
返回textarea的父表参考
3 1 2 Yes
id Sets or returns the id of the textarea (In IE 4 this property is read-only)
设置或返回textarea的id值
4 1   No
name Sets or returns the name of the textarea
设置或返回textarea的name
3 1 2 Yes
readOnly Sets or returns whether or not the textarea should be read-only
设置或返回textarea是否应该为只读
4 1 6 Yes
rows Sets or returns the height (in rows) of the textarea
设置或返回textarea的高度(可由rows属性值来做调整)
3 1 6 Yes
tabIndex Sets or returns the tab order for the textarea
设置或返回textarea的tab顺序
4     Yes
type Returns the type of the form element. For a textarea object it will always be "textarea"
返回表单元素类型。textarea对象返回为"textarea"
3 1 3 Yes
value Sets or returns the text in the textarea
设置或返回textarea的文字
3 1 2 Yes

Textarea 对象方法

Method
方法
Description
描述
IE F N W3C
blur() Removes focus from the textarea
取消textarea的焦点
3 1 2 Yes
click() Simulates a mouse-click in the textarea
模仿鼠标在textarea里的点击
4     No
focus() Sets focus on the textarea
为textarea设置焦点
3 1 2 Yes
select() Selects and highlights the entire text that is in the textarea
选中并用高亮textarea里面的文字
4 1 2 Yes

Textarea 对象事件

语法: object.event_name="someJavaScriptCode"

Event
事件
Description
描述
IE F N W3C
onBlur Executes some code when the textarea loses focus
当textarea失去焦点的时候执行代码
3 1 2  
onChange Executes some code when the textarea loses focus and its value has altered
当textarea失去焦点的时候里面的内容又发生变化则执行一些代码
3 1 2  
onClick Executes some code when the user clicks the left mouse button in the textarea
当鼠标左键在textarea里点击后执行某些代码
4      
onFocus Executes some code when the textarea gets focus
当textarea得到焦点的时候执行代码
3 1 2  
onKeyDown Executes some code when a key is pressed down in the textarea
当在textarea里按住键的时候执行某些代码
  1 4  
onKeyPress Executes some code when a key is pressed in the textarea
当textarea里按过键就执行某些代码
  1 4  
onKeyUp Executes some code when a key is released in the textarea
当在textarea里释放按键的时候执行代码
  1 4  
onSelect Executes some code when some text in the textarea is selected
当textarea里的某些文字被选中的时候执行某些代码
  1 2  

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