#box_menu{

height: 30px;
margin: 0;
padding: 0;
font-family: Tahoma, Verdana, sans-serif; 
font-size: 12px; 
}

#box_menu li{
display: inline;
}


#box_menu li a{
padding: 10px;
text-decoration: none;
}

.hidden{
display:none;
}

.font18{
font-size:18px;
}

.font12{
font-size:12px;
}