body {
margin:0;
}

img {
border:none;
}

#chassis {
width:1008px;
position:relative;
}
a img {
position:absolute;
top:332px;
left:50px;
height:25px;
width:450px;

}

a:link img {opacity:0.8}
a:visited img{background:none;opacity:1}
a:hover img{background:#000000;opacity:0.20}
a:active img{background:none;opacity:1}