var time = 50; // less is faster
	var step = 20; // more is lighter
	function divScrollUp(amount){
	
		document.getElementById("scrolldiv").scrollLeft -= step;
		amount -= step;
		if (amount > 0) 
			setTimeout('divScrollUp(' + amount + ')', time)
	}
	
	function divScrollDown(amount){
	
		document.getElementById("scrolldiv").scrollLeft += step;
		amount -= step;
		if (amount > 0) 
			setTimeout('divScrollDown(' + amount + ')', time)
	}