body
 {
background-repeat: no-repeat; 
background-position:top center;
background-color:#efefef;
margin-top:20px;
max-width:990px;
margin-left:auto;
margin-right:auto;
width: expression(document.body.clientWidth > 1034? "1024px": document.body.clientWidth < 810? "800px" :"100%" );

}