例
如何使用的几个例子longdesc属性：
<!-- The description is on the same page as the image -->
<img src="w3html.gif"
alt="w3ii.com" width="100" height="132" longdesc="#w3htmlExplained">
<!-- The description is in an external page -->
<img src="w3html.gif"
alt="w3ii.com" width="100" height="132" longdesc="w3html.txt">
<!-- The description is one of several within an external page -->
<img
src="w3html.gif" alt="w3ii.com" width="100" height="132" longdesc="http://example.com/desc#item3">
<!-- The description is included in a data:URI -->
<img src="w3html.gif"
alt="w3ii.com" width="100" height="132" longdesc="data:text/html;charset=utf-8;,%3C!DOCTYPE%20html%3E%3Chtml%3E%3Chead%3E%3Ctitle%3EDescription%20of%20the%20Logo%3C/title%3E%3C/head%3E%3Cbody%3E%3Cp%3ESome%20description%20goes%20here%3C/body%3E%3C/html%3E">
试一试» 定义和用法
所述longdesc属性指定连结的图像的详细说明。
浏览器支持
| 属性 | |||||
|---|---|---|---|---|---|
| longdesc | 不支持 | 不支持 | 不支持 | 不支持 | 不支持 |
句法
<img longdesc="string">
属性值
| 值 | 描述 |
|---|---|
| string | 超链接到的图像的详细说明。 可能的值：
|