window.addEvent('load', function() {
	var img = $(document.getElements('#sfeerbeeld img')[0]);
	var pgwidth = 900;
	var imgwidth = img.getSize().x;
	if (imgwidth < 1000) return;
	var len = ((imgwidth / pgwidth) - 1) * 8 * 1000; // 6 is widthmultiplier, eg seconden per weergavebreedte
	var start = 0;
	var eind = (imgwidth - pgwidth) * (-1);
	var effect = new Fx.Tween(img, {'property':'margin-left', 'duration' : len, 'transition': 'linear'});
	effect.addEvent('complete', function() {
		start = start ^ eind;
		eind = start ^ eind;
		start = start ^ eind;
		this.start(start,eind);
	}.bind(effect));
	effect.start(start, eind);
});