Carousel = {
		
		register : function (container, itemsShown, itemsCount, itemWidth, jumpStep) {
			var l = document.getElementById (container + '_move_left');
			var r = document.getElementById (container + '_move_right');
			var w = document.getElementById (container + '_items_wrapper');
			jumpStep = jumpStep || 1
			
			var isRunning = false;
			var dx, to;
			
			var z = function() {
				w.scrollLeft += dx;
				if (w.scrollLeft == to) {
					isRunning = false;
					return;
				}
				setTimeout (z, 1);
			}
			
			l.onclick = function() {
				if (isRunning) return;
				if (w.scrollLeft > 0) {
					isRunning = true;
					dx = -jumpStep;
					to = w.scrollLeft - itemWidth;
					z();
				}
			}
			r.onclick = function() {
				if (isRunning) return;
				if (w.scrollLeft < (itemsCount - itemsShown) * itemWidth) {
					isRunning = true;
					dx = +jumpStep;
					to = w.scrollLeft + itemWidth;
					z();
				}
			}
		}
	}