If a certain page on a website does not load for some reason or if a link is not working, the site visitor shall see an error page with some generic message. The page shall have nothing in common with the rest of the website, that may make the visitor leave your Internet site. A solution in such a case is a function made available from some website hosting providers - the ability to set up your own customized error pages which will have the same style and design as your site and that may contain any text or images that you would like dependent upon the particular error. There are four popular errors that can take place and they involve the following so-called HTTP status codes - 400, when your browser sends a bad request to the server and it can't be processed; 401, if you are supposed to log in to see some web page, but you have not done so yet; 403, if you do not have an authorization to view a specific page; and 404, in case a link which you have clicked leads to a file which doesn't exist. In any of these cases, website visitors shall be able to see your custom made content rather than a generic error page.