function NewWindow_popup(url,hauteur,largeur, ref) {
	var winl = (screen.width - largeur) / 2;
	var wint = (screen.height - hauteur) / 2;
	winprops = 'height='+hauteur+',width='+largeur+',top='+wint+',left='+winl+',scrollbars='+ref;
	win = window.open(url, '', winprops)
	}