function Popup_distributie() {
	width_="800"; height_="555";
	features_="width="+width_+", height="+height_+", left="+((screen.width-width_)/2)+", top="+((screen.height-height_)/2)+", toolbar=no, menubar=no, location=no, scrollbars=yes, status=no, resizable=yes, fullscreen=no";
	newPopup=window.open("centre.html","",features_);
	}