#adoos {display:block; width:100%;
  background: url(convegno.jpg) no-repeat center center ; 
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
  filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='.convegno.jpg', sizingMethod='scale');
-ms-filter: "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='convegno.jpg', sizingMethod='scale')";
position:relative;z-index:1;cursor:pointer;
}
#adoos-replaced{position:absolute;top:162px;z-index:2;left:50%;}
@media (min-width: 1200px) { #adoos {  background: url(convegno.jpg) no-repeat center center;margin-top:-60px; }}
@media (min-width: 979px) and (max-width: 1199px) { #adoos  {  background: url(convegno960.jpg) no-repeat center center;margin-top:-60px;  }}