<style type="text/css">
div {margin:0;padding:0;background-color:yellow} Remove default styling

div#navigation{float:left;width:150px;border-right:2px solid red}
div#navigation ul {padding:0px;margin:0px}
div#navigation li a{color:red;text-decoration:none;font-size:12pt;}
div#navigation li {list-style-type:none;background-color:
              lemonchiffon;padding:2px;margin-bottom:2px}

div#main_content {margin-left:158px}  Moves main content across
div#main_content h3 {color:green;font-size:14pt}
div#main_content p {color:black;font-size:12pt}
</style>

• Floated content does not define length of area with background yellow
• So will not look too good if content is small