Change an image key after it's been set, how?

[BdR]

Is it possible to change an image key after it's been initiated? When I try the below code, I get no errors but nothing happens. The image "face_a" displays but it doesn't change to "face_b".

// preloader
game.load.image('face_a', 'face_a.png');
game.load.image('face_b', 'face_b.png');

// create
var myimg = game.load.image('face_a');

// some time later
myimg.key = 'face_b'; // <- nothing happens, no error no graphics change

If I start with "face_b" and then later change key to "face_a" it shows the "face_b" image, so the png images are loaded properly. I've also tried myimg.frame and myimg.frameName but nothing seems to work.

[stupot]

Never tried to change an objects's key this way,  I use loadTexture to change an existing graphic.

[BdR]

Thanks, loadTexture that was what I was looking for

// some time later
myimg.loadTexture('face_b');