Actionscript issues

Here’s the setup. I have a picture with about 30 instances of button.squares on it (all 30 are individually named - for instance chris_g). Below the picture I have a field full of dynamic text fields all indvidually named, for instance chris_grimmet. When you mouse over the name below I want chris’ face to be boxed in by the instance of square. Basically just framing it up. At load the square’s alpha is set to zero, and onRollOver I want it 100. Here’s the code I can’t seem to get to work for this task…

stop();

chris_g.onRollOver = function() {
chris_grimmett._alpha = 100;
};

chris_g.onRollOut = function() {
chris_grimmett._alpha = 0;
};

Thanks, Matt