jGrowl is officially on cdnjs.  This means that if you want to use jGrowl you don't even have to download it anymore.  Simply add this code to your page and get started:

https://gist.github.com/stanlemon/5382662

Looking for a full-fledged example, checkout:

https://gist.github.com/stanlemon/5382659

Or click here to try it out on JS Bin right now!

Many thanks to the good folk at CloudFare for cdnjs!