Help me optimize my code

programming flash
1

I know there must be an easier way to write this code using loops/arrays, but I can seem to get it working with AS3. I have been writing in AS3 for under 3 days, I just made the switch from AS2.0. Can someone help me! I would consider paying someone to explain it to me over the phone!

here is my code:

// variables
var popInfo:popMc;


// load xml
var xml:XML = new XML();
var loader:URLLoader = new URLLoader();
loader.load(new URLRequest("data/cities.xml"));
loader.addEventListener(Event.COMPLETE,
    function(evt:Event):void {
        xml = XML(evt.target.data);
        //trace(xml.city[0].@weburl.toString());
        var url:URLRequest = new URLRequest(xml.city[0].@weburl.toString()); 

    }
);

// event listeners
stage.addEventListener(MouseEvent.CLICK, onClickStageRemove);

carBtn0.addEventListener(MouseEvent.CLICK, onClickLoadData);
carBtn0.addEventListener(MouseEvent.MOUSE_OVER, onCarHover);
carBtn0.addEventListener(MouseEvent.MOUSE_OUT, onCarOut);

carBtn1.addEventListener(MouseEvent.CLICK, onClickLoadData);
carBtn1.addEventListener(MouseEvent.MOUSE_OVER, onCarHover);
carBtn1.addEventListener(MouseEvent.MOUSE_OUT, onCarOut);

carBtn2.addEventListener(MouseEvent.CLICK, onClickLoadData);
carBtn2.addEventListener(MouseEvent.MOUSE_OVER, onCarHover);
carBtn2.addEventListener(MouseEvent.MOUSE_OUT, onCarOut);

carBtn3.addEventListener(MouseEvent.CLICK, onClickLoadData);
carBtn3.addEventListener(MouseEvent.MOUSE_OVER, onCarHover);
carBtn3.addEventListener(MouseEvent.MOUSE_OUT, onCarOut);

carBtn0.buttonMode = true;
carBtn1.buttonMode = true;
carBtn2.buttonMode = true;
carBtn3.buttonMode = true;


// functions
function onCarHover(event:MouseEvent):void
{
    if(event.target == carBtn0)
    {
    carBtn0.gotoAndPlay(10);
    }
    else if(event.target == carBtn1)
    {
    carBtn1.gotoAndPlay(10);
    }
    else if(event.target == carBtn2)
    {
    carBtn2.gotoAndPlay(10);
    }
    else if(event.target == carBtn3)
    {
    carBtn3.gotoAndPlay(10);
    }
    
}

function onCarOut(event:MouseEvent):void
{
    if(event.target == carBtn0)
    {
    carBtn0.gotoAndPlay(9);
    }
    else if(event.target == carBtn1)
    {
    carBtn1.gotoAndPlay(9);
    }
    else if(event.target == carBtn2)
    {
    carBtn2.gotoAndPlay(9);
    }
    else if(event.target == carBtn3)
    {
    carBtn3.gotoAndPlay(9);
    }
}


function onClickLoadData(event:MouseEvent):void
{
    
    if(event.target == carBtn0)
    {
    popInfo = new popMc();
    popInfo.x = 100;
    popInfo.y = 50;
    addChild(popInfo);    
    popInfo.closeBtn.addEventListener(MouseEvent.CLICK , onClickRemove);
    popInfo.nyopBtn.addEventListener(MouseEvent.CLICK, onClickNYOP);
    popInfo.carsizeText.text = xml.city[0].bidlist.carsize.descendants().toXMLString();
    popInfo.priceText.text = xml.city[0].bidlist.price.descendants().toXMLString();
    popInfo.savingsText.text = xml.city[0].bidlist.savings.descendants().toXMLString();
    popInfo.stateText.text = xml.city[0].@name.toString();    
    }
    else if(event.target == carBtn1)
    {
    popInfo = new popMc();
    popInfo.x = 130;
    popInfo.y = 50;
    addChild(popInfo);    
    popInfo.closeBtn.addEventListener(MouseEvent.CLICK , onClickRemove);
    popInfo.nyopBtn.addEventListener(MouseEvent.CLICK, onClickNYOP);
    popInfo.carsizeText.text = xml.city[1].bidlist.carsize.descendants().toXMLString();
    popInfo.priceText.text = xml.city[1].bidlist.price.descendants().toXMLString();
    popInfo.savingsText.text = xml.city[1].bidlist.savings.descendants().toXMLString();
    popInfo.stateText.text = xml.city[1].@name.toString();    
    }
    else if(event.target == carBtn2)
    {
    popInfo = new popMc();
    popInfo.x = 100;
    popInfo.y = 50;
    addChild(popInfo);    
    popInfo.closeBtn.addEventListener(MouseEvent.CLICK , onClickRemove);
    popInfo.nyopBtn.addEventListener(MouseEvent.CLICK, onClickNYOP);
    popInfo.carsizeText.text = xml.city[2].bidlist.carsize.descendants().toXMLString();
    popInfo.priceText.text = xml.city[2].bidlist.price.descendants().toXMLString();
    popInfo.savingsText.text = xml.city[2].bidlist.savings.descendants().toXMLString();
    popInfo.stateText.text = xml.city[2].@name.toString();    
    }
    else if(event.target == carBtn3)
    {
    popInfo = new popMc();
    popInfo.x = 100;
    popInfo.y = 50;
    addChild(popInfo);    
    popInfo.closeBtn.addEventListener(MouseEvent.CLICK , onClickRemove);
    popInfo.nyopBtn.addEventListener(MouseEvent.CLICK, onClickNYOP);
    popInfo.carsizeText.text = xml.city[3].bidlist.carsize.descendants().toXMLString();
    popInfo.priceText.text = xml.city[3].bidlist.price.descendants().toXMLString();
    popInfo.savingsText.text = xml.city[3].bidlist.savings.descendants().toXMLString();
    popInfo.stateText.text = xml.city[3].@name.toString();    
    }
    
}

    
function onClickRemove(event:MouseEvent):void
{
    removeChild(popInfo);
}

function onClickStageRemove(event:MouseEvent):void
{
    if(event.eventPhase == EventPhase.AT_TARGET) {
        removeChild(popInfo);
    }
}

function onClickNYOP(event:MouseEvent):void 
{
    //navigateToURL(url, "_blank");
    // navigateToURL(urlNY, "_blank"); //trying to get this variable to work
    ExternalInterface.call("selectNY");

}

// set button mode here