Converting Keydown to mouseclick/touchevent.

I am creating a simple game, where crunk, flies up and down with the help of gravity. At the moment, my code only works for the arrow keys on the keyboard, and I am looking to convert the code so that the user could press on the screen/click to make Crunk fly. In short, I am trying to convert a keydown event, to a touchevent or mouseclick event.I am fairly new to flash so go easy on me.

Current code:

var keysDown:Array=[];
stage.focus=stage;
stage.addEventListener(KeyboardEvent.KEY_DOWN,addKey);
stage.addEventListener(KeyboardEvent.KEY_UP,removeKey);

function addKey(event:KeyboardEvent):void {
    keysDown[event.keyCode]=true;
}

function removeKey(event:KeyboardEvent):void {
    keysDown[event.keyCode]=false;
}

var timer:Timer=new Timer(25);
timer.addEventListener(TimerEvent.TIMER, tick);
timer.start ()
function tick(event:Event):void {
    if (keysDown[Keyboard.RIGHT]) {        trace("right key is down!");    }
}



var accelleration:Number=2;
var friction:Number=0.5;
var maxspeed:Number=15;
var backmaxspeed:Number=-15;

var yspeed:Number=0;
var gravity:Number=2;
var yaccelleration:Number=25;
var ground:Number=crunk.y;
var jumping:Boolean=false;

addEventListener(Event.ENTER_FRAME, jump);
function jump(e:Event):void {
    if (jumping) {        crunk.y-=yspeed;        if (crunk.y<=ground) {            jumping=false;        }    }    if ((keysDown[Keyboard.UP])) {        jumping=true;        yspeed=yaccelleration;    }        crunk.y-=yspeed;      //Keeping the crunk within screen boundaries    if ((crunk.y < ground)&&(jumping == false)) {        yspeed-=gravity;    }    if (crunk.y>ground) {        crunk.y=ground;    }     if (crunk.y< -121) {        crunk.y=-119;    }    if (crunk.y< -115) {        yaccelleration=0;            }    else (yaccelleration = 25)
}

Any help would be extremely helpful! If anyone could rewrite this code for mouseclick using the same variables that would be fine as well.