Abstract: To reduce a burden on a user in editing tree structure data with a text editor. When a selection range is designated on an edit screen, a node selection unit of a tree structure data editing device selects one or more node IDs in the tree structure data, based on the position of the selection range. When a paste target for the selection range is designated on the edit screen, a connection target determination unit determines a connection target node ID in the tree structure data, based on the position of the paste target. A tree structure data editing unit edits the tree structure data such that the node or nodes identified by the one or more node IDs is/are connected to the node identified by the connection target node ID. A conversion unit convers the tree structure data edited by the tree structure data editing unit into text data. A display control unit updates the edit screen displayed, based on the text data converted by the conversion unit.

Abstract: An advertisement delivery system 1 includes an information manager, a timing information retriever, a selection determiner, and a selection handling processor. When switching between images displayed in a partial area on a web page is performed, the information manager keeps information about a pre-switching image even after the switching. The timing information retriever retrieves the timing of the switching and the timing of a selection operation by a user on the area. When the timing information retriever retrieves the timing of the selection operation within a predetermined time length after the switching, the selection determiner makes a determination as to which of the pre-switching image and a post-switching image the selection operation is intended for. Based on the determination, the selection handling processor performs a selection handling process based on information about the pre-switching image or the post-switching image.

Abstract: To reduce a burden on a user in editing tree structure data with a text editor. When a selection range is designated on an edit screen, a node selection it of a tree structure data editing device one or more node IDs in the tree structure data, based on the position of the selection range. When a paste target for the selection range is designated on the edit screen, a connection target determination unit determines a connection target node ID in the tree structure data, based on the position of the paste target. A tree structure data editing unit edits the tree structure data such that the node or nodes identified by the one or more node IDs is/are connected to the node identified by the connection target node ID. A conversion unit convers the tree structure data edited by the tree structure data editing unit into text data. A display control unit updates the edit screen displayed, based on the text data converted by the conversion unit.

Abstract: An advertisement delivery system 1 includes an information manager, a timing information retriever, a selection determiner, and a selection handling processor. When switching between images displayed in a partial area on a web page is performed, the information manager keeps information about a pre-switching image even after the switching. The timing information retriever retrieves the timing of the switching and the timing of a selection operation by a user on the area. When the timing information retriever retrieves the timing of the selection operation within a predetermined time length after the switching, the selection determiner makes a determination as to which of the pre-switching image and a post-switching image the selection operation is intended for. Based on the determination, the selection handling processor performs a selection handling process based on information about the pre-switching image or the post-switching image.

Abstract: An information processing apparatus acquires, from a history storage unit, the number of histories of a predetermined action of a user corresponding to acquired user identification information identifying a requesting user. The information processing apparatus acquires, from the history storage unit, user identification information of a different user who is different from the user and whose history includes page identification information included in a transmission request when the acquired number of histories of the predetermined action of the user is smaller than a threshold value. The information processing apparatus acquires a history of a predetermined action of the different user which includes user identification information of the different user from the history storage means. The information processing apparatus determines the advertisement on the basis of the acquired history of the predetermined action of the different user.