var speed = 3;
var intervall = 40;

if      (navigator.appName == "Netscape" && parseInt(navigator.appVersion) >= 5) { var ns_version = 5; }
else if (navigator.appName == "Netscape" && parseInt(navigator.appVersion) < 5)  { var ns_version = 4; }
else if (navigator.appVersion.indexOf("MSIE 4") != -1) { var ie_version = 4; }
else if (navigator.appVersion.indexOf("MSIE 5") != -1) { var ie_version = 5; }
else var ie_version = 5 //default Browser

function get_element_scroll(name,nameclip) {
   if      (ie_version > 4 || ns_version > 4) { return document.getElementById(name).style; }
   else if (ns_version == 4)                  { return eval("document." + nameclip + ".document." + name); }
   else if (ie_version == 4)                  { return eval("document.all." + name + ".style"); }
}

function anhalten(){
	clearInterval(SCROLL)
}

function fahren(wohin){
	wohin2 = wohin*speed
	SCROLL = setInterval("scroll(wohin2)", intervall)
}

function scroll(richtung){
	lage = lage + richtung;
	if ((lage > grenzeunten) && (lage < grenzeoben)){ get_element_scroll('dynLayer','dynLayerClip').top = lage; }
	else if (lage <= grenzeunten) { get_element_scroll('dynLayer','dynLayerClip').top = grenzeunten; lage = grenzeunten;}
	else if (lage >= grenzeoben) { get_element_scroll('dynLayer','dynLayerClip').top = grenzeoben; lage = grenzeoben; }
}