$(document).ready(function(){
    /* Add prototype functions */
    Element.prototype.Testing = function(){console.log('test');};
    Element.prototype.Hey = function(){console.log('see');};
    Element.prototype.Woot = function(){console.log('haha');};
    
    /* Get first form element */
    var test = $('form')[0];
    
    /* Execute those added prototype functions */
    test.Testing();
    test.Hey();
    test.Woot();
    
    /* Clone element */
    var testClone = test.cloneNode();
    
    /* Execute the added "Hey" prototype function */
    testClone.Hey();
});