<style type="text/css" media="screen">
<!-- 
body {
margin: 0;
padding: 0;
background: white;
font: 80% verdana, arial, sans-serif;
}
dl, dt, dd, ul, li {
margin: 0;
padding: 0;
list-style-type: none;
}

#cont_menu {
position:relative;
width: 1000px; /* correction pour Opera */
margin:0 auto;
z-index:10000;
}

#menu {    /*absolu*/ 
position: absolute;
top: -20px;
left: 50%;
z-index:10000;
width: 1000px;
margin-left: -300px;
}
/*#menu {
/*position: absolute; /* placement du menu, à modifier selon vos besoins */
/*top: 0;
left: 0;
z-index:100;
width: 1000px; /* correction pour Opera 
margin:0 auto;
}*/
#menu dl {
float: left;
width: 300px;
}

#menu dt {
cursor: pointer;
text-align: center;
font-weight: bold;
font-size:0.8em;
/*background: #ccc;*/
border: 1px solid gray;
margin: 1px 1px 0 1px;
}
#menu dd {
display: none;
border: 1px solid gray;
}
#menu li {
text-align: center;
font-size:0.8em;
background: #fff;
}
#menu li a, #menu dt a {
color: #000;
text-decoration: none;
display: block;
height: 100%;
border-bottom: 1px solid #CCCCCC;
}
#menu li a:hover, #menu li a:focus, #menu dt a:hover, #menu dt a:focus {
background: #eee;
}
#site {
position: absolute;
z-index: 1;
top : 70px;
left : 10px;
color: #000;
background-color: #ddd;
padding: 5px;
border: 1px solid gray; 
}
-->
</style>