Newbie - HELP WITH CODE PLEASE!

Question

Hi guys,
I have recently started using flash as some of the guys i work with suggested that it would be useful...
I am currently designing a basic site in AS3 and am stuck with a bit of coding. I keep getting the error message:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at new_web_v1_fla::MainTimeline/frame141()
and having searched the net i cant find a solution. Here's my code:
stop();
function gohome(e:MouseEvent):void {
    gotoAndStop("home");
back_btn1.addEventListener(MouseEvent.CLICK, gohome);
function goit(e:MouseEvent):void {
    gotoAndStop("it");
it_btn.addEventListener(MouseEvent.CLICK, goit);
next_btn1.addEventListener(MouseEvent.CLICK, goit);
back_btn2.addEventListener(MouseEvent.CLICK, goit);
function goom(e:MouseEvent):void {
    gotoAndStop("om");
om_btn.addEventListener(MouseEvent.CLICK, goom);
next_btn2.addEventListener(MouseEvent.CLICK, goom);
back_btn3.addEventListener(MouseEvent.CLICK, goom);
function gogd(e:MouseEvent):void {
    gotoAndStop("gd");
gd_btn.addEventListener(MouseEvent.CLICK, gogd);
next_btn3.addEventListener(MouseEvent.CLICK, gogd);
back_btn4.addEventListener(MouseEvent.CLICK, gogd);
function gocu(e:MouseEvent):void {
    gotoAndStop("cu");
cu_btn.addEventListener(MouseEvent.CLICK, gocu);
next_btn4.addEventListener(MouseEvent.CLICK, gocu);
I hope someone can help me out!
Thanks
Jon

Answer 1

Thanks again for the advice, following your instructions i did use the // infornt of various bits of script.
My AS now looks like this and the buttons that have the as left in the script without // before them work fine, no errors:
stop();
function gohome(e:MouseEvent):void {
    gotoAndStop("home");
//back_btn1.addEventListener(MouseEvent.CLICK, gohome);
function goit(e:MouseEvent):void {
    gotoAndStop("it");
it_btn.addEventListener(MouseEvent.CLICK, goit);
next_btn1.addEventListener(MouseEvent.CLICK, goit);
//back_btn2.addEventListener(MouseEvent.CLICK, goit);
function goom(e:MouseEvent):void {
    gotoAndStop("om");
om_btn.addEventListener(MouseEvent.CLICK, goom);
//next_btn2.addEventListener(MouseEvent.CLICK, goom);
//back_btn3.addEventListener(MouseEvent.CLICK, goom);
function gogd(e:MouseEvent):void {
    gotoAndStop("gd");
gd_btn.addEventListener(MouseEvent.CLICK, gogd);
//next_btn3.addEventListener(MouseEvent.CLICK, gogd);
//back_btn4.addEventListener(MouseEvent.CLICK, gogd);
function gocu(e:MouseEvent):void {
    gotoAndStop("cu");
cu_btn.addEventListener(MouseEvent.CLICK, gocu);
//next_btn4.addEventListener(MouseEvent.CLICK, gocu);
the question now is how do i get my other buttons back into the script and get the bloody thing to work?
ARRRGGGHHH! i am beginning to wish that i had never started! lol
Thanks
Jon