e il css:
#novetretre{
margin : 0 auto;
width: 933px;}
#top {
background-image: url(../images/top.png);
background-repeat: no-repeat;
height: 200px;
width: 933px;
margin-top: 20px;}

#logo {
margin-left:40px;
float:left;
width:200px;
margin-top:2px;}

#menu {
background-image: url(../images/menu/bg.png);
background-repeat: repeat-x;
margin-top:157px;
width:300px;
float: left;
padding: 0px 10px 0px 10px;
background-position: 0 10px;
}