function CenterWindow(url, w, h) {

    var left = (screen.width) ? (screen.width - w) / 2 : 0;
    var top = (screen.height) ? (screen.height - h) / 2 : 0;
    var top = 100;
    var settings = "location=1,status=1,scrollbars=1,width=" + w + ", ,height=" + h + ",";
    settings += "top=" + top + ", left=" + left;

    w = window.open(url, "Popup " + url, settings);
}