Flash 'Screensaver' using setInterval

programming flash
1

After detecting that the user is idle for more than the wait time, the ‘areyoustillthere.swf’ movie is played. Which works fine.

But as this movie is played, i want to confirm if the user is really not there. So i need to detect his mousePos again. How do i do that?

var numWaitTime:Number = 2*1000; // Time in seconds to wait, before switching back to main screen

startTracking();

function startTracking() {
	mousePos = -100000;
	trackMove = setInterval(detectIdle, 2000);
}

function detectIdle() {
	if ((_root._xmouse+_root._ymouse) != mousePos) {
		clearInterval(idle);
		idle = setInterval(idleTime, numWaitTime);
	}    
	mousePos = _root._xmouse+_root._ymouse;
}
function idleTime() {
	_root.createEmptyMovieClip("mc1", this.getNextHighestDepth());
	mc1.loadMovie("data/areyoustillthere.swf");
	trace("are you still there?");
	
	mc1._x = 250;
	mc1._y = 125;
	new Tween(mcAsk, "_alpha", Regular.easeIn, 25, 100, 1, true);
	mousePos = _root._xmouse+_root._ymouse;
}
function startTracking() {
	trace("bring user back to home");
}