function openWindow(plik,szerokosc,wysokosc) {
	var left = (screen.width  / 2) - (szerokosc / 2);
	var top  = (screen.height / 2) - (wysokosc  / 2);
	window.open(plik,"","left=" + left + ",top=" + top + ",toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=0,width=" + szerokosc + ",height=" + wysokosc);
}

function resizeto(width,height) {
	var left = (screen.width / 2) - (width / 2);
	var top  = (screen.height / 2) - (height / 2);
	window.resizeTo(width,height);
	window.moveTo(left,top);
}