ul#menu {
list-style-type: none;
width: 100%; /* prcision pour Opera */
}

ul#menu li {
float: left;
}

ul#menu a {
float: left;
margin: 0 2px;
padding: 5px 15px;
text-align: center;
/*border: 1px solid gray;*/
text-decoration: none;
background: #CCCCCC;
font-family: Verdana, Arial, Helvetica, sans-serif;
	font-weight: bold;
	color: #000099;
}

ul#menu a:hover {
background: #FFFFFF;
border: 1px solid gray; 
}