I understand that people want something they can put together quickly, so they find a script that does it and they figure out how to integrate it... but I've learned that it actually takes more time to do all that than write my own little script that does exactly what I'm looking for with less code... and it's optimized for the particular code it works with (for which it works for you grammar-whores ;)).
Not to mention, I've learned way more by doing it myself and in the long run I progress faster... all while writing more efficient code.
And for this very same reason, I don't use jQuery or any other libraries... the majority of them are way too bloated for what I need (most of the time). Exceptions include server-side libraries for graphing, reading/writing from/to excel, etc.