Here the file left.htm is in a frame named leftFrame, main.htm is in a frame named mainFrame.
<head>
<title>My Frameset</title>
</head>
<frameset cols="80,*"
frameborder="NO" border="0" framespacing="0">
<frame name="leftFrame" scrolling="NO"
noresize src="left.htm">
<frame name="mainFrame" src="main.htm">
</frameset>
<noframes><body bgcolor="#FFFFFF">
</body></noframes>
</html>
top.htm is in a frame named topFrame and main.htm is in a frame named mainFrame
<head>
<title>Another Frameset</title>
</head>
<frameset rows="80,*"
frameborder="NO" border="0" framespacing="0">
<frame name="topFrame" scrolling="NO"
noresize src="top.htm" >
<frame name="mainFrame" src="main.htm">
</frameset>
<noframes><body bgcolor="#FFFFFF">
</body></noframes>
</html>
This one is a little more complicated. Notice how the code uses nested framesets to descibe this set up.
<head>
<title>3 frame frameset</title>
</head>
<frameset rows="*"
cols="172,*" frameborder="NO" border="0"
framespacing="0">
<frame name="leftFrame" scrolling="NO"
noresize src="left.htm">
<frameset rows="141,*" frameborder="NO" border="0"
framespacing="0" cols="*">
<frame name="topFrame" noresize
scrolling="NO" src="top.htm">
<frame name="mainFrame" src="main.htm">
</frameset>
</frameset>
<noframes><body bgcolor="#FFFFFF">
</body></noframes>
</html>