51help TIY
码：
<html> <frameset cols="25%,50%,25%"> <frame src="../example/html/frame_a.html" tppabs="http://www.51help.tk/example/html/frame_a.html"> <frame src="../example/html/frame_b.html" tppabs="http://www.51help.tk/example/html/frame_b.html"> <frame src="../example/html/frame_c.html" tppabs="http://www.51help.tk/example/html/frame_c.html"> <noframes> <body>架！</body> </noframes> </frameset> </html>
查看结果: