// vertical slider control
			var scroller = new Control.Slider('scrollHandle', 'scrollTrack', {
				axis: 'vertical',
				onSlide: function(v) { scrollVertical(v, $('content'), scroller);  },
				onChange: function(v) { scrollVertical(v, $('content'), scroller); }
			});
			
			
			// 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 ($('content').scrollHeight <= $('content').offsetHeight) {
				scroller.setDisabled();
				$('scrollWrap').hide();
			}