window.addEvent('domready', function(){
	var el = $('scrollarea');
	
	// Create the new slider instance
	new Slider(el, el.getElement('.knob'), {
		steps: 200,
		mode: 'vertical',
		onChange: function(step){
			var temp = $('gallery').getScrollSize().y-$('gallery').getSize().y;
			$('gallery').scrollTo(0, step*temp/200);
		}
	}).set(0);
});