function openPopupInClickPosition(e, link, title ,callback, width, height) {
    var top = e.screenY;
    var left = e.screenX;
    var w = window.open(link + "?callback="+callback,
                        title,
                        "left=" + left + ", top=" + top + ", width=" + width + ", height=" + height+ ", menubar=no, resizable=yes, scrollbars=yes, status=no, toolbar=no");
    w.focus();
}

function openNormalPopupInCenterPosition(link, title, width, height) {
    var top = screen.height / 2 - height / 2;
    var left = screen.width / 2 - width / 2;
    var w = window.open(link,
                        "",
                        "left=" + left + ", top=" + top + ", width=" + width + ", height=" + height + ", menubar=no, resizable=yes, scrollbars=yes, status=no, toolbar=no");
    w.focus();
}