#witvlak {
position: absolute;
left: 50%;
margin-left: -318px;
width: 636px;
height: 100%;
background-color: #FFFFFF;
}

#streeplinks {
position: absolute;
left: 50%;
margin-left: -321px;
margin-top: 0px;
background-image: url(../images/lijnvert.gif);
width:3px;
height:100%;
}

#streeprechts {
position: absolute;
left: 50%;
margin-left: 318px;
margin-top: 0px;
background-image: url(../images/lijnvert.gif);
width:3px;
height:100%;
}

#header {
position: absolute;
left: 50%;
margin-left: -318px;
margin-top: 0px;
margin-bottom: 0px;
width:636px;
height:100%;
}

#knoppen {
position: absolute;
left: 50%;
margin-left: -318px;
margin-top: 187px;
margin-bottom: 0px;
width: 246px;
height: 405px;
}

#frame {
position: absolute;
left: 50%;
margin-left: -90px;
margin-top: 187px;
margin-bottom: 0px;
height: 69%;