function handle(delta) {
	var iAantalPixels = 75;
	if (delta < 0 ) {
		window.scrollBy(iAantalPixels, 0);
	}
	else {
		window.scrollBy(-iAantalPixels, 0);
	}
}

function wheel(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;
	}
	if (delta) {
		handle(delta);
	}
}
/* Initialization code. */
if (window.addEventListener)
	window.addEventListener('DOMMouseScroll', wheel, false);
window.onmousewheel = document.onmousewheel = wheel;