51help TIY
码：
<html> <body> <iframe src="../example/html/demo_iframe.html" tppabs="http://www.51help.tk/example/html/demo_iframe.html" name="iframe_a"> <p>Your browser does not support iframes.</p> </iframe> <a href="../index.htm" tppabs="http://www.51help.tk/" target="iframe_a">51help.tk</a> </body> </html>
查看结果: