Passing a string as the name of a Mouse Event Listener function?

Question

Hello,
I am trying to essentially pass a string as a function name into an event listener, but I am not sure how to approach this.  Is there a way to convert a string into a function?  I am not sure how to word my question, so I apologize.
Here is some code I have for me to show you what I am doing.
package{
     //some import statements
     public class changes extends MovieClip{
          var functionName:String
          var aBox:Sprite;
          public function changes(){
                   functionName = "testThis";
                   createButtonBox(16, 16, 32, 32,  functionName);
          public function createButtonBox(anX:Number, aY:Number, aWidth:Number, aHeight:Number, aFunction:String){
               aBox = new Sprite();
               //Some drawing box code
               aBox.addEventListener(MouseEvent.CLICK,[aFunction]()?)
               addChild(aBox)
          public function aFunction(event:MouseEvent){
               trace("test");
Am I on the right track or is this not possible?
Anyhow, thank you in advance.

Answer 1

I guess I misworded my question.  Essentially what I am trying to do is create buttons that have functions called to from an event listener, referenced by a string like this:
public class Document{
     var functionName:String;
     public function Document(){
             createAButton("Test Button A", 32, 32, "testThis");
             createAButton("Test Button B", 64, 64, "testThis2");
     public function createAButton(textOnButton:String, anX:Number, aY:Number, functionToCallTo:String){
               var aButton:Sprite = new Sprite();
               //draw the button
               //set a textfieldup for the button to have
              aButton.addEventListener(MouseEvent.CLICK, functionToCallTo)
     public function testThis(event:MouseEvent){
               trace("testA");
     public function testThis2(event:MouseEvent){
                trace("testB");
Unfortunately aButton.addEventListener(MouseEvent.CLICK, functionToCallTo) gives me a coercian error, which is a given.
aButton.addEventListener(MouseEvent.CLICK, [functionToCallTo]()) gives me TypeError: Error #1006: value is not a function.
I mean I could create a bunch of if statements, but for the number of functions I plan to call to, like about 25 or so, that is pretty tedious.