I would leave it deleted. It is an error at best.
Your frames code is a little strange -
<frameset rows="118,*" frameborder="NO" border="0" framespacing="0">
<frameset cols="*" frameborder="NO" border="0" framespacing="0">
<frame name="topFrame" scrolling="NO" noresize src="MRElogo.htm" >
</frameset>
<frameset cols="*" frameborder="NO" border="0" framespacing="0">
*** what is this frameset for ^^^^^^^^^^^^?
<frameset frameborder="NO" border="0" framespacing="0" rows="*">
*** what is this one for, too ^^^^^^^^^^^?
<frameset cols="208,*" frameborder="NO" border="0" framespacing="0">
<frame name="leftFrame" noresize scrolling="NO" src="leftFrame.htm"
frameborder="NO">
<frame name="mainFrame" src="main.htm" frameborder="NO">
</frameset>
</frameset>
</frameset>
</frameset>
Why would this code not work as well?
<frameset rows="118,*" frameborder="NO" border="0" framespacing="0">
<frameset cols="*" frameborder="NO" border="0" framespacing="0">
<frame name="topFrame" scrolling="NO" noresize src="MRElogo.htm" >
</frameset>
<frameset cols="208,*" frameborder="NO" border="0" framespacing="0">
<frame name="leftFrame" noresize scrolling="NO" src="leftFrame.htm"
frameborder="NO">
<frame name="mainFrame" src="main.htm" frameborder="NO">
</frameset>
</frameset>