简单教程
提交运行
代码编辑器：
<!DOCTYPE html> <meta charset="utf-8"> <title>简单教程(twle.cn)</title> <link href="/static/next/css/tryit.css?v=2017082407" rel="stylesheet"/> <footer>简单教程，简单编程<br/>Copyright © 简单教程 www.twle.cn</footer> <img id="compman" src="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>
运行结果：