A website server provides a program for a web page of a predetermined website to a user terminal. The program for the web page causes the user terminal to implement a display module and a search module. The display module causes a first article selected by a user to be displayed and causes a search window to be displayed at a position after a position where the first article ends. The search module searches for a second article related to a character string entered in the search window. The display module causes information related to the second article identified by a search using the search module to be displayed near the search window.