Slider Navigation

var thumbNum:Number = 20;
var spacing:Number = 10;
var thumbs:MovieClip = new MovieClip();
addChild(thumbs);
for (var i:int = 0; i<thumbNum; i++){
	var t:MovieClip = new MovieClip();
	with(t.graphics) beginFill(0x666666), drawRect(0,0,100,50);
	t.x = i * (t.width + spacing);
	t.y = 5;
    t.buttonMode = true;
	thumbs.addChild(t);
}
var minX:Number = stage.stageWidth - thumbs.width - spacing;
var destX:Number = thumbs.x = spacing;
var velX:Number = 10;
var stageThird:Number =  stage.stageWidth / 3;
var right:Number = stageThird * 2;
var left:Number  = stageThird;
addEventListener(Event.ENTER_FRAME, onLoop);
function onLoop(evt:Event):void {
	if (mouseX > right){
	   destX -= velX;
	}
	if (mouseX < left){
		destX += velX;
	}
	if (destX < minX){
		destX = minX;
	}
	if (destX > spacing){
		destX = spacing;
	}
	thumbs.x += (destX - thumbs.x) /4;
}

This snippet shows a technique for a common type of navigation.