Border Around Site

Hey guys, I would like to have a border around the browser inner window. I created four MC’s and added the following AS:

mcBorderTop._y = 0;
mcBorderTop._width = Stage.width;
mcBorderLeft._x = 0;
mcBorderLeft._y = 0;
mcBorderLeft._height = Stage.height;
mcBorderLow._x = 0;
mcBorderLow._y = Stage.height - 4;
mcBorderLow._width = Stage.width;
mcBorderRight._x = Stage.width - 4;
mcBorderRight._y = 0;
mcBorderRight._height = Stage.height;

… and a listener in case user resizes the browser window. Is there a more resource efficient way to achive this? Maybe somehow with a shape border?

Thanks