Movieclip buttons to stick in down state

1

Hi,
I’d like a movie clip button to stick on the “down” state while on the current page until the next button is pressed. After the button is pressed, the movie clip for that page loads, but the button goes into the rollout stage if the mouse is moved away from the button. Is there a line I can add to have the button stay in the down state while the current page is loaded until the next button is pressed?

Here’s the action script I have for the button:

btnNav_mc.btnAbout_mc.onRollOver = function () {
btnNav_mc.btnAbout_mc.gotoAndPlay("_over");
}

btnNav_mc.btnAbout_mc.onRelease = function() {
btnNav_mc.btnAbout_mc.gotoAndStop("_down");
mcLoader.loadClip(“about.swf”,myLoader);
}

btnNav_mc.btnAbout_mc.onRollOut = function() {
btnNav_mc.btnAbout_mc.gotoAndPlay("_out");
}

Let me know if you’d like me to attach the .fla file.
Thanks for your assistance.