Helper libraries, like jQuery, are usually bloated and there is no easy way to select only individual parts you need.
This is a collection of small, stand-alone pieces you can easily combine into a single JS file with the merge.bat script.
They all use a global "js" root object as a namespace, for example js.get_cookie().
The code is usually so simple you don't even need any additional documentation.
Feel free to submit your own pieces, provided they are small and beautiful :)