Set variable within another context

I have the following function

"use strict";

function Player

{

    this.width;

    this.height;

    this.framesA = 5;



    this.image = new Image();

    this.image.onload = function ()

    {

        width = this.width;

        height = this.height / framesA;

    }

    this.image.src = "Images/angel.png";

}

How can I make this code to work?

I want the width and height in the Player function be inalized with the width and the height of the image when the onload function is called.

I need this to work with strict mode (A must).

If this should be accomplished another way feel free to teach.

EDIT: I updated the code to reflect a more realistic situation(I didn't know this will be so complicated)

EDIT 2: Another update to the code. I didn't notice that I wrote var insted of this. Sorry.

Thanks in advance