body, html {
 height:100%;
 margin:0px;
 background-color:#5CC8F6;
}


#passovirtual { 
 position:absolute;
 width:auto; 
 height:auto;
 left:0px;
 top:50%;
} 

#site { 
 position:relative;
 width:1000px; 
 height:auto;
 margin: 0px auto;
}