// vertical slider control
			var sliderV = new Control.Slider('scroll-handle', 'scroll-handle-track', {
				axis: 'vertical',
				range: $R(0,20),
				values: [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20],
				onSlide: function(v) { scrollVertical(v, $('scroll-content'), sliderV);  },
				onChange: function(v) { scrollVertical(v, $('scroll-content'), sliderV); }
			});
			
	
			// scroll the element vertically based on its width and the slider maximum value
			function scrollVertical(value, element, slider) {
				element.scrollTop = Math.round(value/slider.maximum*(element.scrollHeight-element.offsetHeight));
			}
			
		
			// disable vertical scrolling if text doesn't overflow the div
			if ($('scroll-content').scrollHeight <= $('scroll-content').offsetHeight) {
				sliderV.setDisabled();
				$('scroll-handle-wrapper').hide();
			}
			
			
			// mouse wheel code from http://adomas.org/javascript-mouse-wheel/
			function handle(delta) {
				sliderV.setValueBy(-delta);
			}

			/** Event handler for mouse wheel event. */
			function wheel(event){
				var delta = 0;
				if (!event) /* For IE. */
					event = window.event;
				if (event.wheelDelta) { /* IE/Opera. */
					delta = event.wheelDelta/120;
					/** In Opera 9, delta differs in sign as compared to IE. */
					if (window.opera)
						delta = -delta;
				} else if (event.detail) { /** Mozilla case. */
					/** In Mozilla, sign of delta is different than in IE.
					* Also, delta is multiple of 3.
					*/
					delta = -event.detail/3;
				}
		
				/** If delta is nonzero, handle it.
				* Basically, delta is now positive if wheel was scrolled up,
				* and negative, if wheel was scrolled down.
				*/
				if (delta)
					handle(delta);
		
				/** Prevent default actions caused by mouse wheel.
				* That might be ugly, but we handle scrolls somehow
				* anyway, so don't bother here..
				*/
				if (event.preventDefault)
					event.preventDefault();
				
				event.returnValue = false;
			}

			// mozilla
			Event.observe('scroll-zone', 'DOMMouseScroll', wheel);
			
			// IE/Opera
			Event.observe('scroll-zone', 'mousewheel', wheel);