I was importing some code from static HTML pages into a client’s home grown CMS system this morning. When I reviewed the site in Firefox with Firebug running, I was seeing the error:
b.support not defined
The site uses Fancybox to display the window overlays within the site so I had to step through the code and to find out what broke during the migration. Turns out it was a stupid mistake on my part.
Make sure that you include a reference to the jquery library before you load fancybox.