function init() {
	var scroller  = null;
	var scrollbar = null;

	var el1 = document.getElementById("content");
	var el2 = document.getElementById("scrollbar");

	if (el1 && el2) {
		scroller  = new Scrolling.Scroller(el1, 0, 430);
		scrollbar = new Scrolling.Scrollbar(el2, scroller, new Scrolling.ScrollTween());
		var dim = scroller.getDimensions();
	    if (dim.vheight < dim.theight) {
			document.getElementById('scrollbar').style.visibility = 'visible';
		} else {
			document.getElementById('scrollbar').style.visibility = 'hidden';
		}
	}
}

window.onload = window.onresize = function () {
	init();
}