window.addEvent('domready', function() {
	document.mountainContainer = $('mountainContainer');
	document.footerContainer = $('footerContainer');
	if(document.mountainContainer && document.footerContainer) {
		document.resizeBackground();
		window.addEvent('resize', document.resizeBackground);
		window.addEvent('scroll', document.resizeBackground);
	}
});

document.resizeBackground = function() {
	if(document.mountainContainer && document.footerContainer) {
		var scrolls = window.getScroll();
		var newHeight = 260 + (Fx.Transitions.Quart.easeOut(Math.min(scrolls.y, 800) / 800)*185);
		document.mountainContainer.setStyle('height', newHeight);
		if(scrolls.x || document.footerContainer.offsetLeft) document.footerContainer.setStyle('left', -scrolls.x);
	}
}