div#centrato {
width: 682px;
margin-left: auto;
margin-right: auto;
}


div#navigation {font-family: tahoma,sans serif; font-size: 75%; font-weight: bolder; color:#c000}
div#navigation {width: 804px;margin-top: -8px;margin-left: -35px;margin-right: 0px;position: fixed}
div#navigation ul{list-style-type: none;margin-top: 10px;margin-bottom: -10px;padding: 0}
div#navigation li{float: left;margin-right: 1;padding:0;
    background: url("images/bottone hover.jpg") no-repeat top left}
div#navigation a{display: block;width: 83px;line-height: 30px;text-decoration: none;
    background: url("images/bottone normale.jpg") no-repeat top left;
    color: #333;text-align: center}
div#navigation a:hover{background-image: none;color: #503325}
div#navigation li#activelink a,div#navigation li#activelink a:hover{
    background: url("images/bottone attivo.jpg") no-repeat top left;color: #6B4131}


div#navigation_vert {font-family: tahoma,sans serif; font-size: 75%; font-weight: bolder; color:#c000}
div#navigation_vert {width: 100px;margin-top: 0px;margin-left: 10px;margin-left: 14px}
div#navigation_vert ul{list-style-type: none;margin-top: 1px;margin-bottom: 0px;padding: 0}
div#navigation_vert li{float: left;margin-left: 91px;padding:0;
    background: url("images/bottone hover.jpg") no-repeat top left}
div#navigation_vert a{display: block;width: 83px;line-height: 30px;text-decoration: none;
    background: url("images/bottone normale.jpg") no-repeat top left;
    color: #333;text-align: center}
div#navigation_vert a:hover{background-image: none;color: #503325}
div#navigation_vert li#activelink a,div#navigation li#activelink a:hover{
    background: url("images/bottone attivo.jpg") no-repeat top left;color: #6B4131}


img#topbar {
margin: 0 0 0 0;
position: fixed
}

img#homefoto {
margin: 110 0 1em 0;
}

h1#hometxtcent {
font-family: arial,sans serif;
font-weight: lighter;
font-size: 70%;
text-align : center
}

h1#hometxtcent2 {
font-family: arial,sans serif;
font-weight: lighter;
font-size: 70%;
text-align : left
}


#ext_box_member {
float: left;
background-color: #ff0000; 
border-top: 0px solid #ff0000;
border-bottom: 5px solid #ff0000;
border-left: 0px solid #ff0000;
border-right: 0px solid #ff0000;
width: 220px;
height: 260px;
margin-left: 5px;
margin-right: auto;
margin-top: 10px;
margin-bottom: 10px;
text-align: center;
font-size: 45px;
font-weight: bold;
font-family: verdana;
color: #ffffff;
}

#ext_box_member_op20 {
float: left;
background-color: #ff0000; 
opacity: 0.5;
filter: alpha(opacity=20);
border-top: 0px solid #ff0000;
border-bottom: 5px solid #ff0000;
border-left: 0px solid #ff0000;
border-right: 0px solid #ff0000;
width: 220px;
height: 260px;
margin-left: 5px;
margin-right: auto;
margin-top: 10px;
margin-bottom: 10px;
text-align: center;
font-size: 45px;
font-weight: bold;
font-family: verdana;
color: #ffffff;
}

#ext_box_member_vuoto {
float: left;
width: 220px;
height: 260px;
margin-left: 5px;
margin-right: 0px;
margin-top: 10px;
margin-bottom: 10px;
}

#box_foto_640 {
overflow: visible;
background-color: #000000; 
border-top: 0px solid #000000;
border-bottom: 2px solid #000000;
border-left: 2px solid #000000;
border-right: 2px solid #000000;
width: 640px;
height: auto;
margin-left: 0px;
margin-right: auto;
margin-top: 0px;
margin-bottom: 40px;
text-align: left;
font-size: 12px;
font-weight: bold;
font-family: verdana;
color: #ffff00;
}

#box_foto_480 {
overflow: visible;
background-color: #000000; 
border-top: 0px solid #000000;
border-bottom: 2px solid #000000;
border-left: 2px solid #000000;
border-right: 2px solid #000000;
width: 480px;
height: auto;
margin-left: 0px;
margin-right: auto;
margin-top: 0px;
margin-bottom: 40px;
text-align: left;
font-size: 12px;
font-weight: bold;
font-family: verdana;
color: #ffff00;
}

#box_fotobici_640 {
overflow: visible;
background-color: #000000; 
border-top: 0px solid #000000;
border-bottom: 2px solid #000000;
border-left: 2px solid #000000;
border-right: 2px solid #000000;
width: 640px;
height: auto;
margin-left: 0px;
margin-right: auto;
margin-top: 0px;
margin-bottom: 40px;
text-align: center;
font-size: 12px;
font-weight: bold;
font-family: verdana;
color: #ffff00;
}

#box640_centrato { 
position: absolute; 
left: 50%; 
width: 640px; 
margin-left: -320px; 
}

<style type="text/css">
    img.opaco{
        opacity:0.5;
        filter: alpha(opacity=50);
    }
</style>