#son{
position: absolute;
top: 50%;
left: 50%;
height: 580px;
width: 900px;
margin: -290px 0 0 -450px;
border: 0px solid black;
}

body{
background: url(afbeeldingen/achtergrond_algemeen.jpg) no-repeat center center #1C1C1C;
}

#popup{
background: white;
}