jQuery to JS converter

I'm an eLearning developer, and while I love the use of jQuery, It's not always possible (for many reasons, but mainly security restrictions our IT department has placed on us) to use jQuery with the things I build.

Does anyone know of a simple way to convert a line of jQuery into Javascript? I understand that jQuery is just a library of Javascript and wondered how easy it would be to convert my already written jQuery into the Javascript equivalent?

Any input would be great! :)