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HTML DOM longDesc属性


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Definition and Usage
定义与用法

The longDesc property sets or returns a URL to a document containing a description of the image.
longDesc属性可设置或返回包含图片描述文档的URL

This description is a supplement to the "alt" attribute, and it can be useful for non-visual user agents.
描述是在"alt"属性上进行补充的,这些文字在那些非视觉用户代理很有用。

Syntax
语法

imageObject.longDesc=URL


Example
举例

The following example creates a link to the description of the image:
建立一个能够描述图片的链接:

<html>
<body>
<img id="compman" src="compman.gif"
longdesc="compman_description.htm" alt="Computerman" />

<br />
<script type="text/javascript">
var x=document.getElementById("compman");
document.write("Description for image: ");
document.write('<a href="' + x.longDesc + '">Description</a>');
</script>
</body>
</html>


Try-It-Yourself Demos
尝试与演示

Create a link to the long description of an image
建立一个对图片进行长篇描述的连接

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