function NewWindow(url,nomfenetre,hauteur,largeur) {
	var winl = (screen.width - largeur) / 2;
	var wint = (screen.height - hauteur) / 2;
	date_t = new Date;
	winprops = 'height='+hauteur+',width='+largeur+',top='+wint+',left='+winl+',toolbar=no, menubar=no, location=no, resizable=yes, scrollbar=yes, status=no';
	win = window.open(url, nomfenetre, winprops);
}