W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
运行代码
<html> <body> <iframe src="/example/hdom/frame_a.html" id="frame1" longdesc="/example/hdom/frame_description.html"></iframe> <br /> <script type="text/javascript"> x=document.getElementById("frame1"); document.write("Description for frame contents: "); document.write('<a href="' + x.longDesc + '">Description</a>'); </script> </body> </html>