One way you could to this would be to store the id for the current item in a session variable on the detail page. If you only set this value on the detail page it will always be set to the last viewed item.
You can then use this session variable to filter a recordset on any page to display the details about that item. Is this the type of thing you are looking for? If so just post back with any questions you might have about the specifics and we will help you out.
If you were looking for something different let us know.