[Fess Site Search](https://github.com/codelibs/fess-site-search) provides [scripts](https://fss-generator.codelibs.org/docs/manual) (see below) to help you migrate from GSS/CSE.
Using the, you can replace existing GSS/CSE JavaScript codes with:

```
<script>
  (function() {
    var fess = document.createElement('script');
    fess.type = 'text/javascript';
    fess.async = true;

    protected List<String> commandList;

    protected long commandTimeout = 30 * 1000L;// 30sec

    protected long commandDestroyTimeout = 5 * 1000L;// 5sec

    protected File baseDir;

    private Timer destoryTimer;

    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {