<html> <head> <title>frame test</title> </head> <frameset cols="50%,*"> <frame src="about:blank" name="frame1"> <frameset rows="50%,*"> <frame src="about:blank" name="frame2"> <frame src="about:blank" name="frame3"> </frameset> <noframes> Please see by the browser corresponding to the frame. </noframes> </frameset> </html>