html { 
height: 100%; 
}
body { 
background:#2D2D2D;
margin: 0px; 
padding: 0px; 
height: 100%; 
width: 100%;
border-top: 1px 
transparent solid; 
margin-top: 0.75%;
z-index:0; 
position:absolute; 
font-family: tahoma; arial, sans-serif; 
}
#outer{ 
margin: 0 auto;
width:784px;
height:557px;
padding:0;
background:#000;
background-repeat:repeat-x; 
background-image:url(imagenes/portada.jpg);
position:relative; 
}