Holy moly, am I drunk?

programming flash
1

So I’ve been sitting here for the past three days, trying to figure out what’s going wrong every time I play this .swf file. I’m fairly new to this whole Flash as3 deal and if someone could help me out with the coding I would be very appreciative.

It’s pretty repetitive. All I’m trying to do is get a different page to come up when you click a subbutton. I keep getting this:

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at centerpiece4_fla::left_1/frame1()

This is what I have for actions:

function invisClipOver(event:MouseEvent):void { 
gotoAndStop(1);
}
invisiClip.addEventListener(MouseEvent.ROLL_OVER, invisClipOver);

// CLICK fuctions for all 6 main buttons
function main1Over(event:MouseEvent):void { 
gotoAndPlay("down1");
}
function main2Over(event:MouseEvent):void { 
gotoAndPlay("down2");
}
function main3Over(event:MouseEvent):void { 
gotoAndPlay("down3");
}
function main4Over(event:MouseEvent):void { 
gotoAndPlay("down4");
}
function main5Over(event:MouseEvent):void {
gotoAndPlay("down5");
}
function main6Over(event:MouseEvent):void {
gotoAndPlay("down6");
}


// Event Listeners for all 6 main buttons
mainbtn1.addEventListener(MouseEvent.CLICK, main1Over);
mainbtn2.addEventListener(MouseEvent.CLICK, main2Over);
mainbtn3.addEventListener(MouseEvent.CLICK, main3Over);
mainbtn4.addEventListener(MouseEvent.CLICK, main4Over);
mainbtn5.addEventListener(MouseEvent.CLICK, main5Over);
mainbtn6.addEventListener(MouseEvent.CLICK, main6Over);

//Code so when you scroll over John Taylor's World Atlas, return to home
function worldatlas (event:MouseEvent):void {
    gotoAndStop("stop");
}

jtay_btn.addEventListener(MouseEvent.ROLL_OVER, worldatlas);

//Code for subbuttons
function antcol(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/ant-col.html"), "_self");
}

function artcol(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/art-col.html"), "_self");
}

function boocol(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/boo-col.html"), "_self");
}

function ephcol(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/eph-col.html"), "_self");
}

function mapcol(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/map-col.html"), "_self");
}

function phocol(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/pho-col.html"), "_self");
}

function antrare(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/ant-rar.html"), "_self");
}
function artrare(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/art-rar.html"), "_self");
}
function boorare(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/boo-rar.html"), "_self");
}
function ephrare(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/eph-rar.html"), "_self");
}
function maprare(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/map-rar.html"), "_self");
}
function phorare(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/pho-rar.html"), "_self");
}

function antuni(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/ant-uni.html"), "_self");
}
function artuni(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/art-uni.html"), "_self");
}
function boouni(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/boo-uni.html"), "_self");
}
function ephuni(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/eph-uni.html"), "_self");
}
function mapuni(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/map-uni.html"), "_self");
}
function phouni(event:MouseEvent):void {
    navigateToURL(new URLRequest("http://jtaylorsgalleries.com/pho-uni.html"), "_self");
}

col1.addEventListener(MouseEvent.CLICK, antcol);
col2.addEventListener(MouseEvent.CLICK, artcol);
col3.addEventListener(MouseEvent.CLICK, boocol);
col4.addEventListener(MouseEvent.CLICK, ephcol);
col5.addEventListener(MouseEvent.CLICK, mapcol);
col6.addEventListener(MouseEvent.CLICK, phocol);

rare1.addEventListener(MouseEvent.CLICK, antrare);
rare2.addEventListener(MouseEvent.CLICK, artrare);
rare3.addEventListener(MouseEvent.CLICK, boorare);
rare4.addEventListener(MouseEvent.CLICK, ephrare);
rare5.addEventListener(MouseEvent.CLICK, maprare);
rare6.addEventListener(MouseEvent.CLICK, phorare);

uni1.addEventListener(MouseEvent.CLICK, antuni);
uni2.addEventListener(MouseEvent.CLICK, artuni);
uni3.addEventListener(MouseEvent.CLICK, boouni);
uni4.addEventListener(MouseEvent.CLICK, ephuni);
uni5.addEventListener(MouseEvent.CLICK, mapuni);
uni6.addEventListener(MouseEvent.CLICK, phouni);

and in actions a stop(); each 10 frames.

Any ideas?