var foto = '';
function formularz(katalog_id,x,y) {
var w = screen.width;
var h = screen.height;
kat_id  = katalog_id;
var lpos = (w-x)/2;
var tpos = (h-y)/2;

var dane = "width=" + x + ",height=" + y +",top=" + tpos + ",left=" + lpos + ", status=no, scrollbars=no";

window.open('formularz.php','formularz',dane);
}