function otworz(url,name,w, h)
{
var l = screen.width / 2 - 640 / 2;
var t = screen.height / 2 - 480 / 2;
var Win = window.open(url,name,"toolbar=no,menubar=no, location=no, personalbar=no, status=no, resizable=yes, scrollbars=yes, copyhistory=no, width=640, height=480, left=" + l + ", top=" + t);
Win.resizeTo(w + 10, h + 30);
Win.moveTo(l, t);
}