function openPopWin(winURL, winWidth, winHeight, winScroll) {
        var winOptions = 'menubar=no,toolbar=no,location=no,directories=no,status=no,scrollbars=' + winScroll + ',resizable=no,width=' + winWidth + ',height=' + winHeight;
        popup = window.open(winURL, 'popup', winOptions);
    }

    function closePopWin() {
        if (popup && popup.open && ! popup.closed) popup.close();
    }