(see guidelines for overcoming access barriers)
This assists adaptive technologies to identify and navigate through frames. Use titles that describe the frame contents, such as "Navigation" and "Main Site Content" rather than meaningless titles like "Left Frame" and "Top Frame."
If your frameset is complex, you may want to include a description of the frames and how they interrelate, using the LONGCDESC attribute:
Below is the code for a frameset with the following structure:

<frameset rows="20%,80%" frameborder="YES" border="0" framespacing="0">
<frame title="banner" name="banner" noresize src="banner.htm" >
<frameset cols="15%,85%*" frameborder="YES"
border="0" framespacing="0" rows="*">
<frame title="navigation" name="nav_frame" noresize src="nav.htm">
<frame title="body" name="mainFrame" src="main.htm">
</frameset>
</frameset>
<noframes>
<a href = "noframe.htm" title="No frames">
Click here for home page without frames</a>
</noframes>