[flexcoders] App background image size

[oneworld95]

Hi. Is there a way to have the background image of a Flex app to stay
the same size regardless of the size of the browser window? Here's the
CSS in the Flex 3 app,

Application {
  background-image: Embed("global/media/flowers.png"); 
}

I have a datagrid that resizes itself as you page through it. This
causes the browser window to be stretched down and the image to also
get resized. Help. Thanks.