Full width progress bar

1

I have a full screen flash movie and I made a progress bar that I would like to have equal to whatever the width of the stage is at that time. The code I am using right now is


loadBar.onEnterFrame = function() {
    var amount = Math.floor(((getBytesLoaded()/getBytesTotal())*100));
    loadBar._width = amount;
    percent.text = amount+"%";
    if (amount>=100) {
        delete loadBar.onEnterFrame;
        gotoAndPlay(3);
    }
};

Although this code does work, its really setting the bar equal to that in pixels. I need it more along the lines of say if it was at 10%…rather it being 10 pixels, I need it to be 10% of the Stage.width. Any idea on how to do this? Thanks.