The trick

Using the supplied template, you can generate useful doorway pages. The keywords and content cannot be seen by visitors. When accessing the doorway pages, visitors are immediately forwarded to the actual document.

For the forwarding JavaScript is used, which the program generates automatically. At the moment search engines cannot detect this method (however, this may be changed at any time).

If a visitor deactivates JavaScript the automatic forwarding fails. In that case, a content is displayed which does not include the content of the doorway page but other provisional information.