Assign an .onClick() function to a generic/automatically created button?

Hey Scripters.

I'm back again with another noodle scratcher. I'm attempting to write a script UI dialog with one simple checkbox at the top, then a group of buttons underneath. The number of buttons generated and their display text will vary from doc to doc, so I am creating the buttons with a loop. However, because of this i encountered an issue I hadn't anticipated.

I want to set each button to run a function that sets a couple variables and then closes the dialog window. Normally, I would use:

buttonName.onClick(){function(){

          set variables

          window.close();

     }

}

unfortunately, since I'm using a loop to create each button, i don't have a unique variable set for each button, so I don't know how to assign the .onClick().... Any thoughts on this?

here's the jumbled mess of code I'm working with as of right now.. I apologize in advance..

function placeAdditionalArt(addArtLayer){        var addArt = addArtLayer.pageItems[0];        var layerName = addArtLayer.name;        var pieces = wearerLayer.layers["Prepress"].layers[0].pageItems;               //begin script ui window// determine destination shirt piece and whether or not to scale               var aaLoc = new Window("dialog", "Additional Artwork");        var aaLocInfo = createAALoc();        function createAALoc(){            var result;            var scale;            var scaleGroup = aaLoc.add("group");                var yesNoscale = scaleGroup.add("checkbox", undefined, "Scale Artwork");            var pieceGroup = aaLoc.add("group");                for(var a=0;a<pieces.length;a++){                    var thisPiece = pieces[a];                    var thisName = pieces[a].name;                    if(thisName.indexOf("Waistband")<0 && thisName.indexOf("Cuff")<0 &&                    thisName.indexOf("Collar")<0 && thisName.indexOf("Placard")<0){                        pieceGroup.add("button", undefined, thisName);                        this.onClick = function(){ //this.onClick doesn't work because i imagine this refers to pieceGroup in this context..                            result = thisPiece;                            if(yesNoScale){                                scale = true;                            }                            aaLoc.close();                        }                      }                }            aaLoc.show();            return [result,scale];        }        var destPiece = aaLocInfo[0];        var scaleAddArt = aaLocInfo[1];               // end script ui               for(var a=0;a<prepressLayer.layers.length;a++){            var curSize = prepressLayer.layers[a].name;            var dest = prepressLayer.layers[a].groupItems.getByName(curSize + " " + destPiece);            var scale = (newWidth / addArt.width)*100;            var addArtCopy = addArt.duplicate(dest);            addArtCopy.resize(scale,scale,true,true,true,true,00);            newWidth = newWidth + addscale;            addArtCopy.name = curSize + " Additional Art";        }    }