function scrollDown(layer,velocity){
	var s = document.getElementById(layer);
	if (parseInt(s.style.top)>(230-parseInt(s.offsetHeight))){
		sX = parseInt(s.style.top) - velocity;
		s.style.top = sX + "px";
		if(onDown==true) {
			setTimeout("scrollDown('"+layer+"',"+velocity+")",1); 
		} else {
			return;
		}
	}
}

function scrollUp(layer,velocity){
	cpt1=0;
	var s = document.getElementById(layer);
	if (parseInt(s.style.top)<=0){
		sX = parseInt(s.style.top) + velocity;
		s.style.top = sX + "px"; 

		if(onUp
			==true) {
			setTimeout("scrollUp('"+layer+"',"+velocity+")",1);
		} else {
			return;
		}
	}
}

function onUpFunc(layer, velocity) {
	onUp=true;
	scrollUp(layer, velocity);
}

function onDownFunc(layer, velocity) {
	onDown=true;
	scrollDown(layer, velocity);
}

function onOut() {
	onUp=false;
	onDown=false;
}