If you reached this page, it is probably because the rishida.net (and people.w3.org/rishida) site was hacked on 9th January and I haven't yet restored the page you were looking for.
I am currently working through the whole site to strengthen security, and looking at alternative hosting arrangements for PHP-based apps. It may take a while to complete the restoration, since I have to squeeze the work into my limited personal time.
Wherever possible, I am converting PHP to ordinary HTML. In some cases this will mean that in the interim you won't be able to fire up an app from another or fire up with parameters. Some apps that can't be converted from PHP will need to wait a little longer to be restored.
I'm aware that many people use my tools and articles on a regular, often daily, basis for their work, and I'll try to make them available again asap. Sorry for the inconvenience.