Object.extend(Event, {
	wheel:function (event){
		var delta = 0;
		if (!event) event = window.event;
		if (event.wheelDelta) {
			delta = event.wheelDelta/120; 
			if (window.opera) delta = -delta;
		} else if (event.detail) { delta = -event.detail/3;	}
		return Math.round(delta); //Safari Round
	}
});

function scrollMouseWheel(e) {
	scrollBy(Event.wheel(e)*-50, 0);
}

Event.observe(document, "mousewheel", scrollMouseWheel, false);
Event.observe(document, "DOMMouseScroll", scrollMouseWheel, false);