I am trying to get buttons to stay in the down state after it is clicked and remain there. I want the user to know what buttons they have clicked. I am using flash 8. Here is code:

my1_btn.onPress = function () {
gotoAndStop("down");
};
my2_btn.onPress = function () {
gotoAndStop("down");
};
my3_btn.onPress = function () {
gotoAndStop("down");
};
my4_btn.onPress = function () {
gotoAndStop("down");
};
my5_btn.onPress = function () {
gotoAndStop("down");
};

the down state works when pressed but doesn't stay.