Stage.width :: OBJECT SCALING TO

I have a swf that fills the whole browser window but the content stays at 100% scale. like this:

Stage.showMenu=false;
Stage.scaleMode=“noScale”;

However I want a solid bar in the background to be 400px high, but at the same time fill the 100% of the width of the browser window.

Any help would be appreciated.

Thanks for the help in advance!! :mu: