@SteveJessop, remember to give a hyperlink to "Javascript hacks that enable a very unrelated web page to check no matter if a supplied URL is with your background or not" It is possible to not always count on privateness of the full URL possibly. As an example, as is usually https://https-www-andersoncarlcon55329.bloggip.com/37595752/uk-copyright-application-service-no-further-a-mystery