Design CSS : Klasse ab bestimmer Höhe mitfahren lassen ?

<script language=javaScript>

function setVariables(){
y1=-50;ob=1;max=20 // this max sets the distance from the top of the page
                                       // "max" entspricht dem css "top"


if (navigator.appName == "Netscape") {
v=".top=";h=".left=";dS="document.";sD="";
y="window.pageYOffset";x="window.pageXOffset";iW="window.innerWidth";iH="window.innerHeight"
}
else {h=".pixelLeft=";v=".pixelTop=";dS="";sD=".style";
y="document.body.scrollTop";x="document.body.scrollLeft";iW="document.body.clientWidth";iH="document.body.clientHeight"
}


object="object1";
checkLocationA()
}
movex=0,movey=0,xdiff=0,ydiff=0,ystart=0,xstart=0


function checkLocation(){
//  innerX=eval(iW)-115 // place to the right
 innerX=21 // controls the horizontal from the left side of the page

//  innerY=eval(iH)-35 // place at the bottom
  innerY=16 // controls the verticle from the top of the page
if (document.layers){innerY-=10;innerX-=10}
yy=eval(y);
xx=eval(x);
ydiff=ystart-yy;
xdiff=xstart-xx;
if ((ydiff<(-0.01))||(ydiff>(0.01))) movey=Math.round(ydiff/10),ystart-=movey
if ((xdiff<(-0.01))||(xdiff>(0.01))) movex=Math.round(xdiff/10),xstart-=movex


N=(document.layers)?1:0
V=(N) ? 4:5
if (V==4){
object="nav"
eval(dS+object+sD+v+(ystart+innerY+10));
eval(dS+object+sD+h+(xstart+innerX+10));



//eval(dS + objectX + sD + v + y);
}
else{
object=document.getElementById('Nav')
object.style.top=ystart+innerY
object.style.left=xstart+innerX


//object=document.getElementById('object2')
//object.style.top=50+innerY
//object.style.left=50+innerX

}




setTimeout("checkLocation()",10)}

function checkLocationA(){
ystart=eval(y)+5;
xstart=eval(x)+5;}
spread=40
function scrollOn(){
items=5
if (ob<=items){
objectX="object"+ob;
y1+=10;

N=(document.layers)?1:0
V=(N) ? 4:5
if (V==4){
eval(dS + objectX + sD + v + y1);}
else{
object=document.getElementById(objectX)
object.style.top=y1}


//eval(dS + objectX + sD + v + y);


        if (y1<max) xx=setTimeout ("scrollOn()",20)
        else y1=-50, max+=spread, ob+=1, xx=setTimeout("scrollOn()",20) // this max sets the spacing
        }
if (ob>5){clearTimeout(xx);checkLocation();}
}



</script>