Something

body {
 font: 11px verdana, sans-serif;
 background: #AFA99B url("fond.jpg") top left no-repeat;
 margin: 0;
 padding: 0;
}
dl, dt, dd, ul, li {
margin: 0;
padding: 0;
list-style-type: none;
}

#menuDeroulant
{
	position: absolute;
	background: #6A6458;
	width: 100%;
	height: 21px;
	list-style-type: none;
	margin: 0;
	padding: 0;
	border: 0;
}
#menuDeroulant li
{
	float: left;
	width: 16.66%;
	margin: 0;
	padding: 0;
	border: 0;
}
#menuDeroulant li a:link, #menuDeroulant li a:visited
{
	display: block;
	height: 100%;
	color: #FFF;
	background: #3B4E77;
	margin: 0;
	padding: 4px 8px;
	border-right: 1px solid #fff;
	text-decoration: none;
}
#menuDeroulant li a:hover { background-color: #F2462E; }
#menuDeroulant li a:active { background-color: #5F879D; }

#menuDeroulant .sousMenu
{
	display: none;
	list-style-type: none;
	margin: 0;
	padding: 0;
	border: 0;
}
#menuDeroulant .sousMenu li
{
	float: none;
	margin: 0;
	padding: 0;
	border: 0;
	width: 95%;
	border-top: 1px solid transparent;
	border-right: 1px solid transparent;
}
#menuDeroulant .sousMenu li a:link, #menuDeroulant .sousMenu li a:visited
{
	display: block;
	color: #FFF;
	margin: 0;
	border: 0;
	text-decoration: none;
	background: transparent url("fondTR.png") repeat;
}
#menuDeroulant .sousMenu li a:hover
{
	background-image: none;
	background-color: #F2462E;
}

#menuDeroulant li:hover > .sousMenu { display: block; }

#site {
position: absolute;
top : 70px;
left : 10px;
color: #000;
background-color: #ddd;
padding: 5px;
border: 1px solid gray; 
}