is often far outweighed by their drain on the receiver 39 s resources and time media and some image files require relatively great amounts of time to download at the receiving station in addition there appears to be an increasing amount of advertising on the web wherein the seeker of information at times has to be subject to 34 commercials 34 often in the time and resource taxing media formats thus the key to our invention is to give to the user the computer interactive power to try to eliminate the downloading of unneeded ponderous web page files by recognizing the file types which would be expected to include such ponderous files and to prevent such file types from being transmitted to the user in this respect let us consider some conventional file type identifiers on the internet or world wide web files transmitted are identified by file extensions for example dolphins bmp dolphins mov dolphins jpg or dolphins gif where the extensions define the file types the above mentioned cady et al text at pp 300 313 discusses the various file extensions handled by web browsers and the types and nature of the files they designate the present invention is preferably implemented on the net.