ul#menu_a_2livelli{
float: left;
margin: 0;
padding: 0;
border-top: 1px solid #FFF;
border-bottom: 1px solid #FFF;
border-left: 1px solid #FFF;
background: #FFF;
list-style:none;
font: .5em ;
z-index:9999;
/*Trebuchet MS;*/
}	
ul#menu_a_2livelli li ul li{
list-style:none;
margin:0;
padding:0;
z-index:9999;
}
ul#menu_a_2livelli li{
float:left;
margin: 0;
padding: 0;
border-right: 1px solid #999;
color:black;
z-index:9999;
}

ul#menu_a_2livelli a:link,
ul#menu_a_2livelli a:visited{
display: block;
padding: 4px 10px;
color: #808080;
text-decoration: none;
font-family: Arial, Helvetica, sans-serif;
font-weight:bold;
font-size: 12px; 
line-height: 14px;
z-index:9999;
}
ul#menu_a_2livelli a:hover,
ul#menu_a_2livelli a:focus,
ul#menu_a_2livelli a:active{
background-color: #808080;
color: #FFFFFF;
text-decoration: none;
}

ul#menu_a_2livelli li ul{
display: none;
}


ul#menu_a_2livelli li:hover ul{
display: block;
position: absolute;
z-index:1;
width:300px;
padding: 0;
margin: 0 0 0 -1px;
border:1px solid #999;
background: #FFF;
font-size:.8em;
text-align:left;
z-index:9999;
}
ul#menu_a_2livelli li li {
border-bottom:1px solid #999;
width: 300px;
z-index:9999;
}