Almost all the css layout frameworks and artcles that I have encountered seem to rely only on the DIV tag to accomplish the task. Here I present a css layout technique that is inspired by the TABLE tag where I use DIV and SPAN tags similar to the TR and TD tags.
Here are two progressive examples:
Example #1:
<html>
<head><title>An Intuitive CSS Layout Technique</title></head>
<body style="margin: 0px;padding: 0px; font-style: courier">
  <div style="width: 100%;height: 100%">
     <div style="float: left; width: 100%; height: 15%;background-color:#5CB3FF;">
            Header
     </div>	
     <div  style="float: left; width: 100%;height: 70%">			
         <span style="float: left; width: 15%; height: 100%;background-">
            LeftNav
         </span>
         <span style="float: left;width: 70%;height: 100%;">
           Content panel #1
         </span>
         <span style="float: right; width: 15%; height: 100%;background-">
           RightNav
         </span>			
     </div>
     <div style="float: left; width: 100%; height: 15%;background-color:#98AFC7;">
         Footer
     </div>			
   </div>
</body>
</html>
which produces this display:
Example #2:
<html>
<head><title>An Intuitive CSS Layout Technique</title></head>
<body style="margin: 0px;padding: 0px; font-style: courier">
  <div style="width: 100%;height: 100%">
     <div style="float: left; width: 100%; height: 15%;background-color:#5CB3FF;">
            Header
     </div>	
     <div  style="float: left; width: 100%;height: 70%">			
         <span style="float: left; width: 15%; height: 100%;background-">
	                LeftNav
         </span>
         <span style="float: left;width: 70%;height: 100%;background-">
             <span style="float: left;width: 70%;height: 100%;background-">
                 <div style="width: 100%;height: 80%;background-color:white;">
							Cell 4
                 </div>	
                 <div style="width: 100%;height: 20%;background-color:green;">
							Cell 5
                 </div>	
             </span>
             <span  style="float: left;width: 30%;height: 60%;background-">
                 <div style="width: 100%;height: 40%;background-color:white;">
							Cell 6
                 </div>	
                 <div style="width: 100%;height: 60%;background-color:green;">
				     		Cell 7
                 </div>
             </span>								
         </span>
         <span style="float: right; width: 15%; height: 100%;background-">
	                RightNav
         </span>			
     </div>
     <div style="float: left; width: 100%; height: 15%;background-color:#98AFC7;">
         Footer
     </div>			
   </div>
</body>
</html>
which produces this display:
