Hej Peter
Her har du din kode :-)
<html>
    <head>
    </head>
    <body bgcolor="#ffffff">
    </body>
    <script>
if (!document.layers)
document.write('<div id="divStayTopLeft" style="position:absolute">')
</script>
<layer id="divStayTopLeft">
HER ER DIN REKLAME
</layer>
<script type="text/javascript">
/*
Floating Menu script-  Roy Whittle (
http://www.javascript-fx.com/)
Script featured on/available at 
http://www.dynamicdrive.com/This notice must stay intact for use
*/
//Enter "frombottom" or "fromtop"
var verticalpos="frombottom"
if (!document.layers)
document.write('</div>')
function JSFX_FloatTopDiv()
{
    var startX = 3,
    startY = 150;
    var ns = (navigator.appName.indexOf("Netscape") != -1);
    var d = document;
    function ml(id)
    {
        var el=d.getElementById?d.getElementById(id):d.all?d.all[id]:d.layers[id];
        if(d.layers)el.style=el;
        el.sP=function(x,y){this.style.left=x;this.style.top=y;};
        el.x = startX;
        if (verticalpos=="fromtop")
        el.y = startY;
        else{
        el.y = ns ? pageYOffset + innerHeight : document.body.scrollTop + document.body.clientHeight;
        el.y -= startY;
        }
        return el;
    }
    window.stayTopLeft=function()
    {
        if (verticalpos=="fromtop"){
        var pY = ns ? pageYOffset : document.body.scrollTop;
        ftlObj.y += (pY + startY - ftlObj.y)/8;
        }
        else{
        var pY = ns ? pageYOffset + innerHeight : document.body.scrollTop + document.body.clientHeight;
        ftlObj.y += (pY - startY - ftlObj.y)/8;
        }
        ftlObj.sP(ftlObj.x, ftlObj.y);
        setTimeout("stayTopLeft()", 10);
    }
    ftlObj = ml("divStayTopLeft");
    stayTopLeft();
}
JSFX_FloatTopDiv();
</script>
</html>