Parent window
<html> <frameset rows="100,*" frameborder="yes" border="20px" framespacing="5" cols="*"> <frame name="topFrame" scrolling="NO" noresize src="http://www.java2s.com"> <frameset cols="41%,*" border="15px" framespacing="0" rows="*"> <frame name="topFrame" src="myInnerFrame.htm"> <frame name="mainFrame" src="http://www.java2s.com"> </frameset> </frameset> </html> <!-- Contents of myInnerFrame.htm: <html> <head> <script language="JavaScript"> function P1() { alert(window.parent.mainFrame.document.all.CBP.innerText); } </script></head> <body style="background-color:white;"> <input type="button" value="View Content of CBP" onclick="P1();"> </body> </html> -->