body{
  scrollbar-face-color: rgb(0,0,0);
  scrollbar-highlight-color: rgb(50,50,50);
  scrollbar-shadow-color: rgb(100,100,100);
  scrollbar-3dlight-color: rgb(150,150,150);
  scrollbar-arrow-color: rgb(200,200,200);
  scrollbar-track-color: rgb(150,150,150);
  scrollbar-darkshadow-color: rgb(0,0,0);
  }
div#alles {
width:900px;
position: absolute;
left: 50%;
margin-left: -450px; 
top: 11px;
}