1. A system in a computer networked environment for collecting monitoring information about a display of content, comprising: a content provider site that stores a content file, wherein the content file is associated with at least one computer executable monitoring function to cause collection of monitoring information about the display of content associated with the content file and to transmit the monitoring information to a network site and a content display site to receive the content from the content provider site without involvement of the network site and to display the content associated with the content file, wherein the content display site receives the at least one monitoring function over the network with receipt of the content, the content display site executes the at least one monitoring function when the content is accessed, thereby causing monitoring information about the display of the content to be collected, the at least one monitoring function collects the monitoring information by comparing a position of a monitored image to a position of at least one other image and by recording a time period in which the monitored image is at least partially hidden, wherein the network site did not transfer the content file from the content provider site to the content display site, wherein the network site is different from the content provider site, and wherein the network site is adapted to receive the monitoring information.