Code:
	<!--###DOCUMENT###-->
	<div id="icenter">
		<div id="icontent">
			###CONTENT###
		</div>
		<div id="imenu">
			###MENU###
		</div>
	</div>
	<!--###DOCUMENT###-->
if you use a CMS (which most of the time makes sense) then you won't have to write a lot more html than this (plus some CSS) anyway. every nice text editor will do.