window.onload = function()
{	
	// Vertical
	
	var mask = document.getElementById('scroll-mask');
	var content = document.getElementById('scroll-content');
	
	new Dragdealer('scroll-bar',
	{
		horizontal: false,
		vertical: true,
		yPrecision: content.offsetHeight,
		animationCallback: function(x, y)
		{
			var margin = y * (content.offsetHeight - mask.offsetHeight);
			content.style.marginTop = String(-margin) + 'px';
		}
	});
	
	
}