Something like this? ...
#target Photoshop
app.bringToFront();
main();
function main(){
if(!documents.length) return;
var txtArray = new Array();
txtArray = getTxtInfo();
var win = new Window( 'dialog', '' );
g = win.graphics;
var myBrush = g.newBrush(g.BrushType.SOLID_COLOR, [0.99, 0.99, 0.99, 1]);
g.backgroundColor = myBrush;
win.orientation='stack';
win.p1= win.add("panel", undefined, undefined, {borderStyle:"black"});
win.g1 = win.p1.add('group');
win.g1.orientation = "row";
win.title = win.g1.add('statictext',undefined,'Text Replacement');
win.title.alignment="fill";
var g = win.title.graphics;
g.font = ScriptUI.newFont("Georgia","BOLDITALIC",22);
win.g5 =win.p1.add('group');
win.g5.orientation = "row";
win.g5.alignment='left';
win.g5.spacing=10;
win.g5.st1 = win.g5.add('statictext',undefined,'Layer Name');
win.g5.st1.preferredSize=[110,20];
win.g5.dd1 = win.g5.add('dropdownlist');
win.g5.dd1.preferredSize=[300,20];
win.g10 =win.p1.add('group');
win.g10.orientation = "row";
win.g10.alignment='left';
win.g10.st1 = win.g10.add('statictext',undefined,'Layer Contents');
win.g10.st1.preferredSize=[110,20];
win.g10.et1 = win.g10.add('edittext',undefined,'');
win.g10.et1.preferredSize=[300,20];
win.g10.et1.enabled=false;
for(var a in txtArray){
win.g5.dd1.add('item',txtArray[a][1].toString());
}
win.g5.dd1.selection=0;
win.g10.et1.text=txtArray[0][2].toString();
win.g5.dd1.onChange=function(){
win.g10.et1.text=txtArray[this.selection.index][2].toString();
}
win.g15 =win.p1.add('group');
win.g15.orientation = "row";
win.g15.alignment='fill';
win.g15.st1 = win.g15.add('statictext',undefined,'Replace text with:- ');
win.g15.st1.preferredSize[150,20];
win.g15.et1 = win.g15.add('edittext',undefined,'');
win.g15.et1.preferredSize=[350,20];
win.g20 =win.p1.add('group');
win.g20.orientation = "row";
win.g20.alignChildren='fill';
win.g20.bu1 = win.g20.add('button',undefined,'Update Text');
win.g20.bu1.preferredSize=[200,35];
win.g20.bu2 = win.g20.add('button',undefined,'Cancel');
win.g20.bu2.preferredSize=[200,35];
win.g20.bu1.onClick=function(){
if(win.g15.et1.text == ''){
alert("No replacement text has been entered!");
return;
}
win.close(0);
selectLayerById(Number(txtArray[win.g5.dd1.selection.index][0]));
activeDocument.activeLayer.textItem.contents=win.g15.et1.text;
}
win.center();
win.show();
}
function getTxtInfo(){
var ref = new ActionReference();
ref.putEnumerated( charIDToTypeID('Dcmn'), charIDToTypeID('Ordn'), charIDToTypeID('Trgt') );
var count = executeActionGet(ref).getInteger(charIDToTypeID('NmbL')) +1;
var Names=[];
try{
activeDocument.backgroundLayer;
var i = 0; }catch(e){ var i = 1; };
for(i;i<count;i++){
if(i == 0) continue;
ref = new ActionReference();
ref.putIndex( charIDToTypeID( 'Lyr ' ), i );
var desc = executeActionGet(ref);
var layerName = desc.getString(charIDToTypeID( 'Nm ' ));
var Id = desc.getInteger(stringIDToTypeID( 'layerID' ));
if(layerName.match(/^<\/Layer group/) ) continue;
var layerType = typeIDToStringID(desc.getEnumerationValue( stringIDToTypeID( 'layerSection' )));
var Vis = desc.getBoolean(stringIDToTypeID( 'visible' ));
if( desc.hasKey( stringIDToTypeID( 'textKey' ) )) {
var contents = desc.getObjectValue(stringIDToTypeID('textKey')).getString( stringIDToTypeID('textKey'));
if(!Vis) continue; //do not select hidden layers
Names.push([[Id],[layerName],[contents]]);
}
}
return Names;
};
function selectLayerById(ID, add) {
add = (add == undefined) ? add = false : add;
var ref = new ActionReference();
ref.putIdentifier(charIDToTypeID('Lyr '), ID);
var desc = new ActionDescriptor();
desc.putReference(charIDToTypeID('null'), ref);
if (add) {
desc.putEnumerated(stringIDToTypeID('selectionModifier'), stringIDToTypeID('selectionModifierType'), stringIDToTypeID('addToSelection'));
}
desc.putBoolean(charIDToTypeID('MkVs'), false);
executeAction(charIDToTypeID('slct'), desc, DialogModes.NO);
}
