How to convert jQuery into Javascript Prototype Function

[trinisoljah]

I want to turn this code into a jQuery function using jQuery.fn.prototype. In other words I want to make a function out of it, so that I can call it like so ('examDiv').prototype.('params');

http://jsfiddle.net/wJUHF/40/

the parameters in the prototype are to be used to select the divs in the html
dropdiv is for the class = dropImg
dragdiv is for the class = dragImg
img is for the class = img

 jQuery.fn.rotatable = function(dropdiv,dragdiv,imgdiv) { }