/* dies sind die wichtigen Styles: */
html, body   {margin:0; padding:0; width:100%; height:100%; overflow:hidden;}
#hintergrund {position:absolute; z-index:1; width:100%; height:100%;}
#fest        {position:absolute; top:25px; left:10px; width:150px; z-index:10; border:1px solid #000; padding:10px;}
#scrollbar   {position:absolute; width:100%; height:100%; top:0; left:0; overflow:auto; z-index:2;} 
#inhalt      {padding:5px 300px 20px 200px;}