var foto = '';
function popup(plik,x,y) {
var w = screen.width;
var h = screen.height;
foto="images/" + plik;
var lpos = (w-x)/2;
var tpos = (h-y)/2;
var dane = "width=" + x + ",height=" + y +",top=" + tpos + ",left=" + lpos + ",scrollbars=no";
window.open('popup.html','obrazek',dane);
}