Dynamically Display custom Slider value

I had to create a non-component slider for a project. I am new to actionscript (and entirely self-taught so bear with my probably poor programming style) and have no idea how to display the value as the thumb moves. Is there a way to use the sliderevents outside of the slider components, or is there a way to update a text box as the slider moves outside of the sliderevents. Here is the code for one of the sliders if it helps:

function getPercentageA() {
return Math.ceil(((slidera.thumb.x-slidera.Track.x)/slidera.Track.width)*100);
slidera.Track.addEventListener(MouseEvent.MOUSE_DOWN, slidethumba);
function slidethumba(event:MouseEvent):void {
slidera.thumb.startDrag(false, new Rectangle(slidera.Track.x,slidera.Track.y,slidera.Track.width,0));
slidera.Track.addEventListener(MouseEvent.MOUSE_DOWN, changecolora);
function changecolora(event:MouseEvent):void {
var myColor:ColorTransform=slidera.thumb.transform.colorTransform;
slidera.Track.removeEventListener(MouseEvent.MOUSE_DOWN, changecolora);
stage.addEventListener(MouseEvent.MOUSE_UP, stopslidea);
function stopslidea(event:MouseEvent):void {
slidera.thumb.addEventListener(MouseEvent.MOUSE_DOWN, slidethumba);

Thank you for your help