#main{
position:relative;
margin-left:auto;
margin-right:auto;
width:600px;
margin-top:20px;
}

#site_id a{
position:absolute;
background:url(../img/logo.jpg);
width:567px;
height:75px;
left:0px;
top:0px;
}
#site_id a span{
display:none;
}

#body_img{
position:absolute;
left:5px;
top:75px;
}