A system and method for measuring user interaction with a defined space, such as an advertisement space, on network site on a network, preferably being a web page of a website on the Internet. The system includes at least one server in communication with the network, and the server hosts one or more network sites where each network site includes a display area having one or more defined spaces, and each defined space has a predetermined area on the display area of the network site. The system further includes at least one user computer in communication with the network, and the user computer includes a browser that selectively interacts with the network sites, and has a cursor manipulated by the user about the display area of an interacted network site. The user computer selectively records interaction data relative to cursor placement on a specific defined space on the display area of the interacted network site and then transmits the interaction data to the server hosting the defined space. The method includes the steps of interacting with a network site with the browser on the user computer, selectively recording interaction data on the user computer relative to cursor placement on a specific defined space on the display area of the interacted network site, and transmitting the interaction data to the server hosting the defined space.