function openExtTextWindow(openURL, WindowName, width, height, scroll) {
    var winl = (screen.width - width) / 2;
    var wint = (screen.height - height) / 2;
    var settings = 'height=' + height + ',';
    settings += 'width=' + width + ',';
    settings += 'top=' + wint + ',';
    settings += 'left=' + winl + ',';
    settings += 'scrollbars=' + scroll + ',';
    settings += 'resizable=yes,toolbar=no,location=no,status=no,menubar=no,resizable=yes';
    var newwindow = window.open(openURL, WindowName, settings);
    newwindow.focus();
    return newwindow;
}