Coding a lightbox in a plug in

[ZiNgA BuRgA]

The order of attributes in tags does not matter, so it's possible Firebug is rearranging them.  If you want to check HTML output, you should use the View -> Source option (not sure if View Selection Source is reliable or not).

As for why Lightbox isn't working, it could be a script error on the page?  Enable the Firebug console and see if it comes up with errors.