//Preload & Rollover
function preload()
  {
   if (!document.images) return;
   var ar = new Array();
   var arguments = preload.arguments;
     for (var i = 0; i < arguments.length; i++)
     {
      ar = new Image();
      ar.src = arguments;
     }
   }
 function Bildwechsel(id,neuesbild) 
 {
  knoetchen = document.getElementById(id);
  knoetchen.src = neuesbild;
 }