Works at Document Level but not from addToolButton

I have code that works perfectly when I run it from the document level of Acrobat Pro 8.0.

When I try to put it on the app.addToolButton function I keep getting undefined errors.

Could someone review my code and let me know how to appropriately apply it to a function call from the addToolButton?

This works from Document Level:

var page = this.pageNum;

var numWords = this.getPageNumWords(page);

for (var i=0; i<numWords; i++)

{

var ckWord = this.getPageNthWord(page, i);

var stringInt = parseInt(ckWord);

function buttonLocation(){

var q = this.getPageNthWordQuads(page, i);

m = (new Matrix2D).fromRotated(this,page);

mInv = m.invert()

r = mInv.transform(q)

r=r.toString()

r = r.split(",");

}

function makeCalloutButton(){

var l = this.addField(('000' + ckWord).substr(-3) + "_callout", "button", page, [r[4], r[5], r[2], r[3]]);

l.setAction("MouseUp", "this.callout" + ('000' + ckWord).substr(-3) + "();");

l.userName = "Machine Location";

}

function workMagic(){

buttonLocation();

makeCalloutButton();

}

function doTaps(){

if (ckWord == "AA") {workMagic();}

if (ckWord == "BB") {workMagic();}

if (ckWord == "CC") {workMagic();}

}

doTaps();

}

Then here is my code that DOES NOT work from executing the addToolButton:

app.addToolButton({

       cName: "tapssMaker", // A name for your button

       cExec: "taps();",           //Function to Call

       cLabel: "Taps",           //The Text on the Button

       cTooltext: "Make me some buttons please"           //The Help Text

});

function taps(){

var page = this.pageNum;

var numWords = this.getPageNumWords(page);

for (var i=0; i<numWords; i++)

{

var ckWord = this.getPageNthWord(page, i);

var stringInt = parseInt(ckWord);

function workMagic(){

var q = this.getPageNthWordQuads(page, i);

m = (new Matrix2D).fromRotated(this,page);

mInv = m.invert()

r = mInv.transform(q)

r=r.toString()

r = r.split(",");

var l = this.addField(('000' + ckWord).substr(-3) + "_callout", "button", page, [r[4], r[5], r[2], r[3]]);

l.setAction("MouseUp", "this.callout" + ('000' + ckWord).substr(-3) + "();");

l.userName = "Machine Location";

}

function doTaps(){

if (ckWord == "AA") {workMagic();}

if (ckWord == "BB") {workMagic();}

if (ckWord == "CC") {workMagic();}

}

doTaps();

}

}