I want to add an argument of a function to a string (iam not sure if thats the right word)

```
function changeChart(form, chart, bar) {

            //chart 2 (left)
            $(form).change(function (){

                console.log(form);

                $(form + "option:selected").each(function(){
                //rest of the function

```

I want the form added to the selection in Jquery.

Is this the right way?