Need help with tween class button

i am creating a simple set of a few rectangles stacked on top of eachother (going to be like a stack of postcards) and i want to have the user click on the top rectangle and it moves to reveal the one underneath it. i have it all set up to work except i can’t think of a way to stop it from being clickable after it’s been moved to the side and the 2nd rectangle is revealed. does this make any sense? thanks!

here is my code:

stop();
card1.onPress = function() {
import mx.transitions.Tween;
import mx.transitions.easing.*;
new mx.transitions.Tween(card1, “_x”, mx.transitions.easing.Strong.easeOut, 0, -120, 2, true);
new mx.transitions.Tween(card1, “_y”, mx.transitions.easing.Strong.easeOut, 0, -70, 2, true);
new mx.transitions.Tween(card1, “_rotation”, mx.transitions.easing.Strong.easeOut, 0, -45, 2, true);
};