function popup(www,nazwa,x,y) {
var w = screen.width;
var h = screen.height;
var lpos = (w-x)/2;
var tpos = (h-y)/2;
//var adres = www.replace(/&/g,"--AND--");

var dane = "width=" + x + ",height=" + y +",top=" + tpos + ",left=" + lpos + ", status=no, scrollbars=yes";
window.open(www,nazwa,dane);
}