13. A system for dynamically modifying search results comprising: a user interface on a first computer configured to receive one or more keywords for use as search terms from a user; a search engine on a server in communication with said first computer over a network, said search engine being configured to provide a set of search result objects on a first page of results displayed in response to said keywords and to provide some title and display text with each of said search result objects in said set of search result objects and to provide a plurality of advertisements on said first page of results; a monitoring program in communication with said network, said monitoring program being configured to monitor user behavior in interacting with said search result objects; a re-ranking program configured to monitor which document said user clicks on in interacting with said first set of search result objects; monitor which documents said user skips; compile information to infer user intent based on the content of said document the user clicks on and said documents said user skips; upon said user clicking to return from said document to said set of search result objects including said document, immediately automatically re-rank said set of search result objects based on user intent inferred from said analyzing of the content of said document said user clicks on and said documents said user skips, so that a user clicking on a single document from said set of search result objects results in a re-ranking of said set of search result objects, so that upon said user returning from said document to said set of search result objects including said document, without the user resubmitting the search, the re-ranked results will be visible; and use terms from the title and display text corresponding to a selected object in an algorithm for generating said re-ranking of said set of search result objects on at least said first page; wherein said re-ranking includes moving at least one object from a subsequent page, not originally visible to said user on said first page, onto said first page; wherein said at least one object moved onto said first page is displayed in a manner to indicate to the user that it has been inserted between other objects on said first page, with said display providing an indication that the object is from a subsequent page and was not originally displayed on said first page; an advertising program configured to select and display advertising based on user intent inferred from said analyzing of the content of said document said user clicks on and said documents said user skips and immediately and automatically re-ranking said plurality of advertisements on said first page by adding at least one advertisement not previously shown on said first page.
14. The system of claim 13 wherein said search engine is on a first server, and said monitoring and re-ranking programs are on a second server.