#a_menu {
margin-top: 0px;
height:40px;
background-color: #FA9C39;
float:left;
width:100%;
text-align:center;
}
#a_menu li
{
float: left;
list-style-type: none;
padding-right: 20px;
}
#a_menu li a{
color: #fff;
font-weight: 600;
display: block;
font-size : 13px;
text-decoration: none;

}
#a_menu li a:hover {
background: #FA9C39 url(http://www.almassa.fr/img/menuover.gif) repeat-x;
}
#a_menu ul { padding-left: 5px;}