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DOM Area 
Area Object
Area 对象
The Area object represents an area of an image-map (An image-map is an image with clickable areas). For each instance of an HTML <area> tag in a document, an Area object is created.
Area对象代表了一个图象映像（图片中的可点击区域）。HTML有<area>标签就有Area对象被建立
IE: Internet Explorer, F: Firefox, N: Netscape, W3C: World Wide Web Consortium (Internet Standard).
Area 对象属性
| Property 属性 |
Description 描述 |
IE | F | O | W3C |
|---|---|---|---|---|---|
| accessKey | Sets or returns the keyboard key to access an area 设置或返回可访问area的键盘 |
5 | 1 | No | Yes |
| alt | Sets or returns an alternate text to be displayed, if a browser cannot show an area 设置或返回可用来显示的替换文字，专门对付那些不能显示area的浏览器 |
5 | 1 | 9 | Yes |
| coords | Sets or returns the coordinates of a clickable area in an image-map 设置或返回热点图片可点区的坐标 |
5 | 1 | 9 | Yes |
| hash | Sets or returns the anchor part of the URL in an area 设置或返回area中锚点部分的URL |
4 | 1 | No | No |
| host | Sets or returns the hostname and port of the URL in an area 设置或返回在area里URL的hostname和端口 |
4 | 1 | No | No |
| href | Sets or returns the URL of a link in an image-map 设置或返回热点图的连接URL |
4 | 1 | 9 | Yes |
| id | Sets or returns the id of an area 设置或返回area的id |
4 | 1 | 9 | Yes |
| noHref | Sets or returns whether an area should be active or inactive 设置或返回area应该是活动或是空闲 |
5 | 1 | 9 | Yes |
| pathname | Sets or returns the pathname of the URL in an area 设置或返回area里URL的路径名称 |
4 | 1 | 9 | No |
| protocol | Sets or returns the protocol of the URL in an area 设置或返回area里URL的协议 |
4 | 1 | 9 | No |
| search | Sets or returns the query string part of the URL in an area 设置或返回area里URL的查询字符串部分 |
4 | 1 | 9 | No |
| shape | Sets or returns the shape of an area in an image-map 设置或返回在热点图中area的形状 |
5 | 1 | 9 | Yes |
| tabIndex | Sets or returns the tab order for an area 设置或反货area的tab顺序 |
5 | 1 | 9 | Yes |
| target | Sets or returns where to open the link-URL in an area 设置或返回area中连接URL的打开方式 |
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text的方向 |
5 | 1 | 9 | Yes |
| lang | Sets or returns the language code for an element 设置或返回元素的语言代码 |
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 |
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