返回图片的 longDesc 属性 - 在线编辑器

          <img id="compman" src="/examples/compman.gif" longdesc="description.htm" alt="Computerman" width="107" height="98">
<br>
<p>longdesc属性的值为:
  <script>
    var x = document.getElementById("compman");
    document.write(document.getElementById("compman").longDesc);
  </script>
</p>
        