Tween a movieclip to fadein with Javascript

[jamesp81001848]

I'm tring to make a movieclip fade in after a mouse click. When I used AS 3 I was using Tween transition, but I'm now I'm using Animate Canvas. I'm not sure how to do this? my files FLA files

AS 3

function widgitFadeIn():void
{
fadeIn = new Tween(widgit_mc,"alpha",Strong.easeInOut,0,1,1,true);
}

iNav_mc.play_btn.addEventListener(MouseEvent.CLICK, onNext);

function onNext(e:MouseEvent):void
{
widgitFadeIn();
if (widgit_mc.currentFrame >= 1)
{
widgit_mc.nextFrame();
Tools.disableButton(iNav_mc.pause_btn);
Tools.enableButton(iNav_mc.back_btn);
direction_txt.text = "Click to advance";
}

if (widgit_mc.currentFrame == widgit_mc.totalFrames)
{
Tools.enableButton(iNav_mc.back_btn);
Tools.disableButton(iNav_mc.play_btn);
direction_txt.text = "Previous view";
}
}

Javascript

stage.on("drawstart", setInt, this, true);

function setInt(){
this.iNav_mc.back_btn.mouseEnabled = false;
this.iNav_mc.back_btn.alpha = .5;
this.direction_txt.textBaseline='top';
}

this.iNav_mc.play_btn.addEventListener("click", onNext.bind(this));

function onNext(){

if(this.widgit_mc.currentFrame >= 0){
this.widgit_mc.gotoAndStop(this.widgit_mc.currentFrame + 1);
}
if(this.widgit_mc.currentFrame == this.widgit_mc.timeline.duration -1){
this.iNav_mc.play_btn.mouseEnabled = false;
this.iNav_mc.play_btn.alpha = .5;
this.direction_txt.text = "END of Widgit";
}else{
this.iNav_mc.back_btn.mouseEnabled = true;
this.iNav_mc.back_btn.alpha = 1.0;
}
}

this.iNav_mc.back_btn.addEventListener("click", onPrev.bind(this));
function onPrev(){


if(this.widgit_mc.currentFrame == this.widgit_mc.timeline.duration -1 || this.widgit_mc.currentFrame > 0){
this.widgit_mc.gotoAndStop(this.widgit_mc.currentFrame - 1);
}
if (this.widgit_mc.currentFrame == 0){
this.iNav_mc.back_btn.mouseEnabled = false;
this.iNav_mc.back_btn.alpha = .5;
this.iNav_mc.play_btn.mouseEnabled = true;
this.iNav_mc.play_btn.alpha = 1.0;
this.direction_txt.text = "Click to advance";
}else{
this.iNav_mc.back_btn.mouseEnabled = true;
this.iNav_mc.back_btn.alpha = 1.0;
this.iNav_mc.play_btn.mouseEnabled = true;
this.iNav_mc.play_btn.alpha = 1.0;
this.direction_txt.text = "Click to advance";
}
}