Timer for SS and global

programming flash
1

question about global vars

I am trying to set a timer when no activity removeMovie and attach screen saver. I am trying to use a global var so that I can reset the count. Here is my AS what can I do to reset my timer.


_global.ss = 3;
countDown = function (loadScreen) {
ss --;
if (ss == 0) {
clearInterval(timer);
cont.removeMovieClip("startMC");
cont.attachMovie("screenSaver", "saver", 0);
}
}
timer = setInterval (countDown, 1000);

Then within screenSaver I have a function like so:


onMouseMove = function () {
_root.cont.removeMoveClip.....
_root.cont.attachMovie.....
_global.ss = 3;

how can i reset ss so that it will do countdown again?