var pos=0;
var timer=null;
var sprung=3;
var zeit=5;
var scrolltext;
var layerheight = 180;
var scrollposition = 0;

function initscroll(){
  if(scrolltext){
	if(document.all){
		my_height = document.all.fenster1.offsetHeight-layerheight;
    	platform = window.navigator.platform.toLowerCase();
		if (platform.indexOf('mac') != -1) document.all.fenster1.style.position="absolute";
	}else if(document.getElementById&&!document.all){
		my_height = document.getElementById("fenster1").offsetHeight-layerheight;
    }


	if (my_height > 0 ) {
		if(document.all){
			document.all.scroller.style.visibility="visible";
		}else if(document.getElementById&&!document.all){
			document.getElementById("scroller").style.visibility="visible";
		}
	}
  }

}



function autoscroll(){
	//alert(readCookie('scrollposition'));
	if(document.all){
		document.all.fenster1.style.posTop= -readCookie('scrollposition');
			
	}else if(document.getElementById){
		document.getElementById("fenster1").style.top= -readCookie('scrollposition');
	}
	
	pos = Number(readCookie('scrollposition'));

}




function scrollitdown(){
	if(document.all){
		max=document.all.fenster1.offsetHeight-layerheight;
			if(pos<max+5){
				document.all.fenster1.style.posTop=pos*-1;
			}
	}else if(document.getElementById){
		max=document.getElementById("fenster1").offsetHeight-layerheight;
			if(pos<max+5){
				document.getElementById("fenster1").style.top=pos*-1
			}
	}
	if (pos<max)pos=pos+sprung;
	document.cookie = "scrollposition =" + pos;
	timer=window.setTimeout("scrollitdown()",zeit);
}


function scrollitup(){
    if(pos>0){
        pos=pos-sprung;
		if(document.all){
				document.all.fenster1.style.posTop=pos*-1;
		}else if(document.getElementById&&!document.all){
				document.getElementById("fenster1").style.top=pos*-1;
		}
	}
	document.cookie = "scrollposition =" + pos;
	timer=setTimeout("scrollitup()",zeit);
}



function readCookie(n){
 a = document.cookie;
 res = '';
 while(a != '')
 {
  while(a.substr(0,1) == ' '){a = a.substr(1,a.length);}
  cookiename = a.substring(0,a.indexOf('='));
  if(a.indexOf(';') != -1)
  {cookiewert = a.substring(a.indexOf('=')+1,a.indexOf(';'));}
  else{cookiewert = a.substr(a.indexOf('=')+1,a.length);}
  if(n == cookiename){res = cookiewert;}
  i = a.indexOf(';')+1;
  if(i == 0){i = a.length}
  a = a.substring(i,a.length);
 }
return(res)
}