How to simulate the play even without clicking through the code below

How to simulate the play even without clicking through the code below

Hi,
how to simulate the play even without clicking through the code below:

function registerKeyHandler() {
document.addEventListener('keydown', function (e) {
switch (e.keyCode) {
case 13: // Enter
player.toggleFullscreen();
break;
case 10252: // MediaPlayPause
case 415: // MediaPlay
case 19:
player.playPause();
break;
case 413: // MediaStop
player.stop();
break;
case 48: //Key 0
log();
break;
case 49: //Key 1
setUhd();
break;
case 50: //Key 2
player.getTracks();
break;
case 51: //Key 3
player.getProperties();
break;
case 10009: // Return
if (webapis.avplay.getState() !== 'IDLE' && webapis.avplay.getState() !== 'NONE') {
player.stop();
} else {
tizen.application.getCurrentApplication().hide();
}
break;
default:
log("Unhandled key");
}
});
}