// <![CDATA[
// vertical slider control
var slider3 = new Control.Slider('scroll_handle', 'scrollbar', {
	axis: 'vertical',
	onSlide: function(v) { scrollVertical(v, $('content'), slider3);  },
	onChange: function(v) { scrollVertical(v, $('content'), slider3); }
});
// scroll the element vertically based on its width and the slider maximum value
function scrollVertical(value, element, slider) {
	element.scrollTop = Math.round(value/slider.maximum*(element.scrollHeight-element.offsetHeight));
}
// disable vertical scrolling if text doesn't overflow the div
if ($('content').scrollHeight <= $('content').offsetHeight) {
	slider3.setDisabled();
	$('scroll_bottom').hide();
}
// ]]>