Resizing a movieclip to stage

1

Hello all,
I have a movieclip that i want to resize to fit the stage and center it with a button click. Then resize back to it’s original size and place with a second button. my code needs help, but what am i doing wrong? I want to use this mc to play video full screen or normal.

Code:
import flash.display.StageAlign;
import flash.display.StageScaleMode;

size_btn.addEventListener(MouseEvent.CLICK, resizeHandler);

function resizeHandler(e:Event):void
{

my_mc.x = (my_mc.stage.stageWidth / 2) - (my_mc.width / 2);
my_mc.y = (my_mc.stage.stageHeight / 2) - (my_mc.height / 2);

var newHeight=my_mc.height/my_mc.width;
var newWidth=my_mc.width/my_mc.height;

if((stage.stageHeight/stage.stageWidth)<newHeight)
{
my_mc.width=stage.stageWidth;
my_mc.height=newHeightmy_mc.width;
}
else
{
my_mc.height=stage.stageHeight;
my_mc.width=newWidthmy_mc.height;

stage.align = StageAlign.TOP_LEFT;
stage.scaleMode = StageScaleMode.SHOW_ALL;
stage.dispatchEvent(new Event(Event.RESIZE));
trace (“hello”);
}

}

small_btn.addEventListener(MouseEvent.CLICK, resizeFsHandler);
function resizeFsHandler(e:Event):void
{
my_mc.x = stage.stageWidth-my_mc.width, stage.stageHeight-my_mc.height;
my_mc.y = stage.stageHeight-my_mc.height, stage.stageWidth-my_mc.width;
stage.dispatchEvent(new Event(Event.RESIZE));
trace (“goodbye”);

}