html, body {
height:100%;
margin:0;
background-image:url(../images/fondotodo.jpg);
background-position:center;
}
body {
position:relative;
min-width:760px;
min-height:550px;
font-family:Arial, Helvetica, sans-serif;
font-size:11px;
color:#000000;
}
img { border:0px; margin:0px; padding:0px; }
#cont {
position:absolute;
width:760px;
height:550px;
top:50%;
left:50%;
margin-top:-275px;
margin-left:-380px;
background-color:#ffffff;
}
#cont #contenido {
width:758px;
height:548px;
border:1px solid #000000;
}