The following script can be placed anywhere with the BODY of your page. The first argument of OpenFile is the number of days to subtract from today's date. The second argument is the File Type (Thumbnail is '0'; Full size is '1'). Note: When you 'click' on the thumbnail picture, its full size picture is displayed).
OpenFile(5,0) will display a clickable thumbnail picture from five days ago...
OpenFile(0,1) will display today's full size picture...