The index.html file is generated out of JAlbum or Photoshop. It is completely static. Since it is the starting point for access to possibly hundreds of image pages, the open graph meta tags need to be added dynamically to the file when a Like button is clicked. I can control the link sent to Facebook to have it link to a PHP file that reads the static html file, and adds the meta tags read from a different image wrapper html (slides/imagename.html) file. The information for the iamge file would be read from the extra URL options.