var t;
function scrollUp() {
	var div = document.getElementById('scroll');
	if(div.scrollTop > 0) {
		div.scrollTop--;
		t = setTimeout('scrollUp()',10);
	} else {
		clearTimeout(t);
	}
}
function scrollDown() {
	var div = document.getElementById('scroll');
	if(div.scrollTop < 1000000) {
		div.scrollTop++;
		t = setTimeout('scrollDown()',10);
	} else {
		clearTimeout(t);
	}
}
function scrollStop() {
	clearTimeout(t);
}
function show_coords(event) {
	var x = event.clientX;
	var y = event.clientY;
	if(y < 475) {
		var div = document.getElementById('scroll');
		var current = div.scrollTop;
		div.scrollTop = current - 76;
	}
	if(y > 490) {
		var div = document.getElementById('scroll');
		var current = div.scrollTop;
		div.scrollTop = current + 76;
	}
}