Det ku ikke lige bruges, det flytter sig i "hakker". Jeg fandt et selv. 
Her er koden =) Vi deler point da du i det midste kom med et svar!
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<style type="text/css">
#supertext {
position:absolute;
left:-50;
top-50;
visibility:hide;
visibility:hidden;
}
</style>
<script language="JavaScript1.2">
/*
Bouncy message script- By Dynamicdrive.com
Code based on Lloyd Hassell's, at 
http://www.dynamicdrive.com/dynamicindex4/bounceimage.htmFor full source, TOS, and 100s DTHML scripts, visit 
http://dynamicdrive.com*/
//Configure the below three variables
//1) Set message to display (HTML accepted)
var thecontent='<a href="
http://www.xazer.dk"><img border="0" src="
http://www.doitwithdairy.com/images/cookie.jpg" height="100"></a>'
//2) Set delay after which message should be hidden, in miliseconds ('' makes it incessantly visible on the screen)
var hidetimer='';
//3) Set speed of animation (1-50), where larger is faster
var BallSpeed = 17;
///NO NEED TO EDIT BELOW THIS LINE///////////
var contentWidth;
var contentHeight;
var maxBallSpeed = 50;
var xMax;
var yMax;
var xPos = -200;
var yPos = -55;
var xDir = 'right';
var yDir = 'up';
var superballRunning = true;
var tempBallSpeed;
var currentBallSrc;
var newXDir;
var newYDir;
function initializeBall() {
   if (document.all) {
      xMax = document.body.clientWidth
      yMax = document.body.clientHeight
      document.all("supertext").style.visibility = "visible";
      contentWidth=supertext.offsetWidth
      contentHeight=supertext.offsetHeight
      }
   else if (document.layers) {
      xMax = window.innerWidth;
      yMax = window.innerHeight;
      contentWidth=document.supertext.document.width
      contentHeight=document.supertext.document.height
      document.layers["supertext"].visibility = "show";
      }
   setTimeout('moveBall()',400);
   if (hidetimer!='')
   setTimeout("hidetext()",hidetimer)
   }
function moveBall() {
   if (superballRunning == true) {
      calculatePosition();
      if (document.all) {
         document.all("supertext").style.left = xPos + document.body.scrollLeft;
         document.all("supertext").style.top = yPos + document.body.scrollTop;
         }
      else if (document.layers) {
         document.layers["supertext"].left = xPos + pageXOffset;
         document.layers["supertext"].top = yPos + pageYOffset;
         }
      animatetext=setTimeout('moveBall()',20);
      }
   }
function calculatePosition() {
   if (xDir == "right") {
      if (xPos > (xMax - contentWidth - BallSpeed)) { 
         xDir = "left";
         }
      }
   else if (xDir == "left") {
      if (xPos < (0 + BallSpeed)) {
         xDir = "right";
         }
      }
   if (yDir == "down") {
      if (yPos > (yMax - contentHeight - BallSpeed)) {
         yDir = "up";
         }
      }
   else if (yDir == "up") {
      if (yPos < (0 + BallSpeed)) {
         yDir = "down";
         }
      }
   if (xDir == "right") {
      xPos = xPos + BallSpeed;
      }
   else if (xDir == "left") {
      xPos = xPos - BallSpeed;
      }
   else {
      xPos = xPos;
      }
   if (yDir == "down") {
      yPos = yPos + BallSpeed;
      }
   else if (yDir == "up") {
      yPos = yPos - BallSpeed;
      }
   else {
      yPos = yPos;
      }
   }
function hidetext(){
if (document.all)
supertext.style.visibility="hidden"
else if (document.layers)
document.supertext.visibility="hide"
clearTimeout(animatetext)
}
if (document.all||document.layers){
document.write('<span id="supertext"><nobr>'+thecontent+'</nobr></span>')
window.onload = initializeBall;
window.onresize = new Function("window.location.reload()");
}
</script>