import caurina.transitions.*;

function moveSlider(event:MouseEvent):void {
	var newY:Number=0;

	switch (event.currentTarget) {
		case carBtn :
			newY=0;
			break;
		case truckBtn :
			newY=78;
			break;
		case rvBtn :
			newY=156;
			break;
		case boatBtn :
			newY=234;
			break;
	}
	Tweener.addTween(navSlider_mc, {y:newY, time:.5, transition:"easeOutCubic"});
}

carBtn.addEventListener(MouseEvent.CLICK, moveSlider);
truckBtn.addEventListener(MouseEvent.CLICK, moveSlider);
rvBtn.addEventListener(MouseEvent.CLICK, moveSlider);
boatBtn.addEventListener(MouseEvent.CLICK, moveSlider);

var jump:String;
function playTransition(event:MouseEvent):void{
	switch(event.currentTarget){
		case carBtn:			
			jump="car";
			break;
		case truckBtn:
			jump="truck";
			break;
		case rvBtn:
			jump="rv";
			break;
		case boatBtn:
			jump="boat";
			break;
	}
	play();
}

carBtn.addEventListener(MouseEvent.CLICK,playTransition);
truckBtn.addEventListener(MouseEvent.CLICK,playTransition);
rvBtn.addEventListener(MouseEvent.CLICK,playTransition);
boatBtn.addEventListener(MouseEvent.CLICK,playTransition);

<!--remember the stop(); and gotoAndPlay(jump);-->