Stretch a movieclip to the browser size

Hi there!

I want to have a background movieclip of my SWF stretch to fill the browser window. I know there is a way to detect the size of the browser window in ActionScript, but I am unsure how to tell a movieclip to use those dimensions. I don’t need to worry about changing the proportion of the movie clip as it is just a solid color.

Can someone help me out with code to do this? Thanks so much!