源代码:
<!DOCTYPE html> <html> <body> <img id="compman" src="/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> </body> </html>
运行结果：