源代码 ：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>开源教程(ossoft.cn)</title> </head> <body> <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> </body> </html>
运行结果