function RadEreignis()
{
nWert=parseInt(nWert+event.wheelDelta/6);
document.all.content.style.top=nWert;
}



var step=1
if (ien6){
	document.write('</div></div>')
	var contentobj=document.getElementById? document.getElementById("content") : document.all.content
	var contentheight=contentobj.offsetHeight
	if (document.getElementById&&!document.all){
   		step=1
	}
}
else if(n4){
	var contentobj=document.nscontainer.document.nscontent
	var contentheight=contentobj.clip.height
}
<!-- scroll down function -->
function scrolldown() {
	if(window.scrolltimerup){
		clearTimeout(scrolltimerup)
	}
	if(ien6&&parseInt(contentobj.style.top)>=(contentheight*(-1)+120)){
		contentobj.style.top=parseInt(contentobj.style.top)-step
	}else if(n4&&contentobj.top>=(contentheight*(-1)+120)){
		contentobj.top-=step
	}
	else {
		contentobj.style.top = 230
		 }
	scrolltimerdown = setTimeout("scrolldown()",scrollspeed)
}

<!-- scroll up function -->
function scrollup() {
	if(window.scrolltimerdown){
		clearTimeout(scrolltimerdown)
	}
	if(ien6&&parseInt(contentobj.style.top)<=0){
		contentobj.style.top=parseInt(contentobj.style.top)+step
	}else if(n4&&contentobj.top<=0){ 
		contentobj.top+=step
	}
	scrolltimerup = setTimeout("scrollup()",scrollspeed)	
}


<!-- function to stop all scroll timers -->
function stopall() {
	if(window.scrolltimerup){
		clearTimeout(scrolltimerup)
	}
	if(window.scrolltimerdown){
		clearTimeout(scrolltimerdown)
	}
}
<!-- function that shifts the object to top -->
function shifttotop(){
	stopall()
	if (ien6) {
		contentobj.style.top=0
	}else{
		contentobj.top=0
	}
}

function getcontent_height(){
	if (ien6)
	contentheight=contentobj.offsetHeight
}
window.onload=getcontent_height
shifttotop();