How to use the "noresize" attribute. The frames are not resizable. Move the mouse over the borders between the frames and notice that you can not move the borders.

Edit code and click me	Your Result (Some examples do not work in Google Chrome):
<html> <frameset cols="50%,*,25%"> <frame src="http://xhtml.co.il/tryit/html/frame_a.htm" noresize="noresize" /> <frame src="http://xhtml.co.il/tryit/html/frame_b.htm" /> <frame src="http://xhtml.co.il/tryit/html/frame_c.htm" /> </frameset> </html>
Edit the code above and click to see the result	www.xhtml.co.il - Try it yourself