Help with writing code for button

Question

Hi!
Can someone help me with the code for a button that sends my menu back to 0?
This is the code current code, and I've created a button called sistapilen that I want to insert where the regular button "arrow" is not visible. I want sistapilen to navigate me back to 0. (Or if I can get "arrow" to do it and delete "sistapilen"). 
/Jen
// File downloaded from www.riacodes.com
import com.greensock.*;
var arrayX :Array = [0,-800,-1600,-2400,-3200,-4000,-4800];
var currentIndex:Number=6;
left_mc.addEventListener(MouseEvent.CLICK,navigate);
right_mc.addEventListener(MouseEvent.CLICK,navigate);
left_mc.buttonMode = true;
right_mc.buttonMode = true;
checkArrows();
function navigate(e:MouseEvent):void{
if(e.currentTarget == left_mc) currentIndex --;
else currentIndex ++;
checkArrows();
TweenLite.to(content_mc,.5 ,{x:arrayX[currentIndex]});
function checkArrows():void{
if(currentIndex == 0) left_mc.visible=false;
else if (currentIndex == arrayX.length - 1) right_mc.visible = false;
else{
left_mc.visible = true;
right_mc.visible= true;

Answer 1

Add a listemer for whichever other button you plan to use...
sistapilen.addEventListener(MouseEvent.CLICK,navigate);
And try changing your navigate function as follows...
function navigate(e:MouseEvent):void{
     if(e.currentTarget == left_mc) {
          currentIndex--;
     } else if(e.currentTarget == right_mc){
          currentIndex ++;
     } else {
          currentIndex = 0;
     checkArrows();
     TweenLite.to(content_mc,.5 ,{x:arrayX[currentIndex]});