var moveY=0;
var diffY=0;
var startY=0;
var elempos=0;
var abstandunten=0;
var elem1=document.getElementById("bodenleiste").offsetTop;
var elem2=document.getElementById("inhalt").offsetTop;
elempos=elem1+elem2;

window.setInterval("wanderlogo()", 50);


function wanderlogo() {
 if (window.innerHeight) {
  var yCL=window.pageYOffset;
  var iH=window.innerHeight;
 }
 else {
  var yCL=document.documentElement.scrollTop;
  var iH=document.documentElement.clientHeight;
 }

 if (elempos<=354) {
  abstandoben=294;
 }
 else {
  if (iH-36<elempos) {
    abstandoben=iH-392;
  }
  else {
    abstandoben=elempos-360;
  }
 }

 innerY=abstandoben;

 diffY=startY-yCL;

 if ((diffY<(-1))||(diffY>(1))) {
  moveY=Math.round(diffY/10);
  startY-=moveY;
 }

 logopic=document.getElementById("logo");
 logopic.style.top=innerY+startY+"px";
}