dl, dt, dd, ul, li {
margin: 0;
padding: 0;
list-style-type: none;
}

#menu {
position: absolute; /* placement du menu*/
margin: auto;
padding: auto;
z-index:100;
width: 800; /* correction pour Opera */
}
#menu dl {
float: left;
width: 160; /*largeur des éléments du menu = 800 / nb d'éléments du menu */
}
#menu dt {
text-align: center;
font-weight: bolder;
background: #000000;
font-family:arial;
color:#ffffff;
border: 1px solid gray;
margin: 1px;
}
#menu dd {
display: none;
border: 1px solid gray;
}
#menu li {
text-align: center;
font-weight: bold;
background: #cccccc;
}
#menu li a, #menu dt a {
color: #000000;
text-decoration: none;
display: block;
height: 100%;
border: 0 none;
}
#menu li a:hover, #menu li a:focus, #menu dt a:hover, #menu dt a:focus {
color:#ffffff;
background: #000000;
}

#actu dt a{
color:#ffffff;
background:#000000;
}

#actu dt a:hover{
color:#000000;
background:#ffffff;
}