.lewa_linia { 
width: 449; 
height: 800; 
background: url("lewa.jpg") right; 
background-repeat: repeat; 
}
.prawa_linia {
width: 465; 
height: 800; 
background: url("prawa.jpg") left,top; 
background-repeat: no-repeat; 
}
.srodek { 
width: 766px; 
height: 800px; 
background: url("srodek.jpg") top; 
}



<DIV class=top_line>

width: 100px; 
height: 100px; 
background-color: #0000ff; 
background: url("tlo.gif"); 
background-repeat: no-repeat; 
center 50%;

766" height="800
body { 
BACKGROUND: url(tlo.jpg) center 50%; MARGIN: 7% 0px 2%; HEIGHT: 930px