function popupWindow(url, win_name, w, h, menu) {
        var wx = 830;
        var hy = 600;
        var with_menu = 'no';
       
        if (typeof(w) != 'undefined') {
            if (!isNaN(w) && w > 0) {
                wx = w;
            }       
        }
        if (typeof(h) != 'undefined') {
            if (!isNaN(h) && h > 0) {
                hy = h;
            }
        }
        if (typeof(menu) != 'undefined') {
            if (menu == true) {
                with_menu = 'yes';
            }
        }   
        window.open(url, win_name, 'toolbar=no,location=no,directories=no,status=no,menubar=' + with_menu + ',scrollbars=yes,resizable=yes,copyhistory=no,width=' + wx + ',height=' + hy +',screenX=10,screenY=10,top=10,left=10');
    }