I have downloaded a `HTML5` audio player source from [here](http://%20https://www.script-tutorials.com/html5-audio-player-with-playlist/)
and I want to change the way the player is controlled from clicking to key pressing.

In `js` file I found this:

```
// play click
    $('.play').click(function (e) {
        e.preventDefault();

        playAudio();
    });

```

and I tried to implement this but didn't work:

```
document.onkeydown = function(e) {
if (e.keyCode == 78) {
    e.preventDefault();

        playAudio();
    }};

```

How can I get this to work?