BODY {
background : #C0D9D9;
font : 8pt Verdana, Geneva, Arial, Helvetica, sans-serif;
color : #666666;
margin : 20px 0px 20px 0px;
text-align: center;
}
 
#cuerpo{
text-align: left;
width: 700px;
background-color : #ffffff;
min-height: 100%;
margin:auto;


} 

#cabecera{
	height : 106px;
	width: 700px;
	background-color: #006699;
	background-image:url(banner.gif);
	background-repeat:no-repeat;
	margin: auto;	
}  
#barraarriba{
	text-align: left;
	width: 700px;
	background-color : #C0D9D9;
	height: 20px;
	margin:auto;



} 
#lateral{
	width: 160px;
	float:left;
	padding-top:10px;
}
#contenedor{
	width: 510px;
	background-color: #FFFFFF;
	float:right;
	padding-top:10px;
	padding-right:10px;

} 
<style type="text/css">
#menu div.barraMenu,
#menu div.barraMenu a.botonMenu {
font-family: Verdana, Arial;
font-size: 8pt;
color: white;
}

#menu div.barraMenu {
text-align: left;
}

#menu div.barraMenu a.botonMenu {
background-color: #E1F1F7;
color: #666666;
cursor: pointer;
padding: 4px 6px 2px 5px;
text-decoration: none;
}

#menu div.barraMenu a.botonMenu:hover {
background-color: #65B7D6;
color: #FFFFFF;
}

#menu div.barraMenu a.botonMenu:active {
background-color: #65B7D6;
color: #FFFFFF;
}
</style> 


#encabezado{
font : 15pt Verdana, Geneva, Arial, Helvetica, sans-serif;

} 
div.clear {
	clear: both;
	margin: 0;
	padding: 0;
	}