body {
margin: 0;
padding: 0;
background: white;
font: 80% arial, sans-serif;

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

}
#menu {
position: absolute;

z-index:1;
width: 100%; /* précision pour Opera */
color: #024781;
font: arial, sans-serif;
}
#menu dl {
float: left;
width: 12em;

}
#menu dt {
cursor: pointer;
text-align: center;
font-weight: bold;
background-image:url("bouton2.gif");
border: 1px solid gray;
margin: 1px;

}
#menu dd {
display: none;
border: 1px solid gray;

}
#menu li {
text-align: center;
background-color:#FEDB5F;
font: arial, sans-serif;

}
#menu li a, #menu dt a {
color: #024781;
text-decoration: none;
display: block;

height: 100%;
border: 0 none;
}
#menu li a:hover, #menu dt a:hover {
background-color:#F7E698;
}

#site {
position: absolute;
z-index: 1;
top : 70px;
left : 10px;
color: #263EC4;
background-color: #ddd;
padding: 5px;
border: 1px solid gray; 
}

.mentions {
position: absolute;
top : 300px;
left : 10px;
color: #263EC4;
background-color: #ddd;
}