function Scroller() {
	this.start();
}

Scroller.prototype.start = function() {
	var scroll=this.getPageScroll();
    var maxscroll=document.getElementById("kontener").offsetHeight-document.getElementById("left_kontener").offsetHeight-30;
    if(scroll<=maxscroll) {
        document.getElementById("left_kontener").style.top=scroll+"px";
    }
	//var left=this.getContainerLeft();
	//document.getElementById("left_kontener").style.left=left+"px";
	t=setTimeout("myScroller.start()",100);
}
Scroller.prototype.getPageScroll = function() {
	if (self.pageYOffset) { 
			return  self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){ 
			return document.documentElement.scrollTop;
	} else if (document.body) {
			return document.body.scrollTop;
	}
};
Scroller.prototype.getContainerLeft = function() {
	e=document.getElementById("kontener");
	var left=0;
	while (e.offsetParent){
			left += e.offsetLeft;
			e     = e.offsetParent;
	}

	left += e.offsetLeft;

	return left;
} 




if (window.addEventListener) {
	window.addEventListener("load",initScroller,false);
} else if (window.attachEvent) {
	window.attachEvent("onload",initScroller);
} else {
	window.onload = function() {initScroller();}
}
function initScroller() { myScroller = new Scroller(); }