tryjsref_img_longdesc 在线代码实例

 <img id="compman" src="/upload2/statics/images/w3c/eg_compman.gif" longdesc="description.htm" alt="Computerman" width="107" height="98">
<br>

<p>The value of the longdesc attribute is:
<script>
var x=document.getElementById("compman");
document.write(document.getElementById("compman").longDesc);
</script>
</p>