passing string becomes object

Question

I'm passing with marketing.reg("bum","a","b","c"); a string to a function.

In the first scope it is still a string.

After passing to the next scope it becomes an object. How to avoid it?

    function mktg() {};
    mktg.prototype.reg = function(nameOfEvent,a,b,c) {
    //typeof a,b,c is string
            var fktn= function(a,b,c) {
                console.log(typeof a); //is object not string
                console.log( "fktn a: ",a);
            };

            $(document).on(nameOfEvent, fktn);

    };
    var marketing = new mktg;
    marketing.reg("bum","a","b","c");

Answer 1

The variables a, b and c get replaced by the arguments of the event call "bum".

You should remove the paramters a, b and c from the function fktn.