// JavaScript Document
/* plugin */
		var ScrollSidebar = new Class({
			
			Implements: [Options],
			
			options: {
				offsets: { x:0, y:0 },
				mode: 'vertical',
				positionVertical: 'top',
				positionHorizontal: 'right',
				speed: 400
			},
			
			initialize: function(menu,options) {
				/* initial options */
				this.setOptions(options);
				this.menu = $(menu);
				this.move = this.options.mode == 'vertical' ? 'y' : 'x';
				this.property = this.move == 'y' ? 'positionVertical' : 'positionHorizontal';
				/* ensure a few things */
				var css = { position: 'absolute', display:'block' };
				css[this.options.positionVertical] = this.options.offsets.y;
				css[this.options.positionHorizontal] = this.options.offsets.x;
				this.menu.setStyles(css).set('tween',{ duration: this.options.speed });
				/* start listening */
				this.startListeners();
			},
			
			startListeners: function() {
				var action = function() {
					this.setPosition($(document.body).getScroll()[this.move] + this.options.offsets[this.move]);
				}.bind(this);
				window.addEvent('scroll',action);
				window.addEvent('load',action);
			},
			
			setPosition: function(move) {
				this.menu.tween(this.options[this.property],move);
				return this;
			}
		});
		
		
		
		/* simple code */
		window.addEvent('domready',function() { /*
			//paired with smooooothscroll
			new SmoothScroll({ duration:300 });
			//vars
			var menu = $('sidebar-menu'), offsetY = 20, offsetX = 20, speed = 450;
			var setPosition = function(top) {
				var scroll = $(document.body).getScroll();
				menu.tween('top',scroll.y + offsetY);
			};
			//settings
			menu.set('tween',{ duration: speed }).setStyles({
				position: 'absolute',
				right: offsetX,
				top: offsetY,
				opacity: 0.8
			});
			//events
			window.addEvents({
				scroll: setPosition,
				load: setPosition
			}); */
			//paired with smooooothscroll
			new SmoothScroll({ duration:300 });
			$('sidebar-menu').set('opacity',0.8);
			var sidebar = new ScrollSidebar('sidebar-menu',{
				offsets: {
					x: 20,
					y: 60
				}
			});
			
		});