function winOpen (adr, name, w, h, scr) {
	par = "left=" + Math.floor(window.screenX+(window.innerWidth-w)/2) + ",width=" + w;
	par += ",top=" + Math.floor(window.screenY+(window.innerHeight-h)/2) + ",height=" + h;
	par += ",scrollbars=" + (scr?"yes":"no");
	par += ",resizable=yes";
	return window.open (adr, name, par);
}