A method of serving targeted content messages for display in a website accessed in a browser program of a networked computer communicatively connected to a network at a network address for communications, delivers uniquely targeted content messages displayed in websites viewed in web browsers. The method includes placing a script device in a website file, processing the website file, together with the script device by a particular web browser on download of the website file, including by determining the network address of the networked computer, determining an identifier of the website file, and sending an artifact representing the network address and the identifier over the network to a server computer. The method also includes detecting the network address and the identifier by the server computer, querying a database for a database article related to the network address and the identifier, constructing a script program stored in memory of the server computer for the particular browser and website file, and constructing an ad device stored in memory of the web browser device from the script program. The method further includes calling the server computer by the ad device by communication of an identifier representing an action of the web browser device, receiving the identifier by the server computer, querying the database for a select message artifact related to the script program, the identifier, the website file, and the web browser, and responding by the server computer to the web browser with the select message artifact. A message represented by the select message artifact is displayed in the website then viewed in a browser window of the web browser. Messages can be prioritized and are uniquely targeted in content, based on real-time activities of the web browser.