longdesc
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Image longDesc 属性
定义和用法
longDesc 属性可设置或返回图片的 longDesc 属性值。
longdesc 属性指定了包含图像描述的文档的 URL。
语法
imageObject.longDesc=URL
浏览器支持
所有主要浏览器都支持 longDesc 属性
实例
返回图片的 longDesc 属性值：
<html>
<body>
<img id="compman" src="compman.gif"
longdesc="description.htm" alt="Computerman">
<br>
<script>
<p>The value of the longdesc attribute is:
<script>
var x=document.getElementById("compman");
document.write(document.getElementById("compman").longDesc);
</script>
</p>
</script>
</body>
</html>
<body>
<img id="compman" src="compman.gif"
longdesc="description.htm" alt="Computerman">
<br>
<script>
<p>The value of the longdesc attribute is:
<script>
var x=document.getElementById("compman");
document.write(document.getElementById("compman").longDesc);
</script>
</p>
</script>
</body>
</html>