源代码:
<!DOCTYPE html> <html> <body> <iframe id="myframe" src="http://wfuyu.com" longdesc="w3s.txt"> <p>Your browser does not support iframes.</p> </iframe> <p>The URL of the long description is: <script> document.write(document.getElementById("myframe").longDesc); </script> <p> </body> </html>
运行结果：