Calling Stage Resize Listener on First Frame

Hey there, I’m basically doing this tutorial, but in AS 2.0. I’ve got it working great, but I’m missing something really stupid: how do I call the re-size action at the first frame? It works great once you resize, but isn’t called at the beginning. I’ve tried a few things, but I’m shooting in the dark at this point.

Thanks homies!

sizeListener = new Object();
sizeListener.onResize = function() {
    if((Stage.width > 1920) || (Stage.height >1200)){
        trace("stage bigger than 1920x1200");
        bkg_home._width = Stage.width;
        bkg_home._height = Stage.height;
    } else {

        trace("stage smaller than 1920x1200");

I’ll get into AS3.0 once I have time, don’t want to rewrite a bunch of sites right now for something so small!