Script I made: Iterate Action Over Layers

Hey, just cobbled together this script that I'm already finding useful in my own work, so I figured I'd share, and maybe see if anyone has suggestions for improvement.

What it does, is apply a selected action to each of the selected layers individually.

So for example, if you had 50 layers that you wanted to each rotate by 90 degrees in place, you'd record a rotate-by-90-degrees action, select all the layers you want to apply it to and run the script with the action selected.

#target photoshop
var scriptName = "NinjaScript IterateActionLayers";
var scriptVersion = "0002";
function cID (inVal) { return charIDToTypeID(inVal);}
function sID (inVal) { return stringIDToTypeID(inVal);}
var currentActionSets = getActionSets();
main();
function main()
{
    app.bringToFront();
    optionsDialog();
}
function optionsDialog()
{
    var ButtonWidth = 100;
    
  OpenOptionsDialog = new Window("dialog", scriptName + " v" + scriptVersion);
  OpenOptionsDialog.orientation = 'column';
  OpenOptionsDialog.alignChildren = 'left';
    mainGroup = OpenOptionsDialog.add("group");
    mainGroup.orientation = 'column';
    mainGroup.alignChildren = 'left';
    mainGroup.alignment = 'left';     
    var actionSetGroup = mainGroup.add("group");
    actionSetGroup.orientation = 'row';
    actionSetGroup.add("statictext",undefined, "ActionSet: ")
    var DDActionSet = actionSetGroup.add("dropdownlist",undefined, "")
    DDActionSet.preferredSize.width = 150;
       
    for (var i = 0; i < currentActionSets.length; i++)
    {
            DDActionSet.add("item", currentActionSets);
    }
    DDActionSet.selection = 0;
       
       
    var actionGroup = mainGroup.add("group");
    actionGroup.orientation = 'row';
    actionGroup.add("statictext",undefined, "Action:      ")
    DDActions = actionGroup.add("dropdownlist",undefined, "")
    DDActions.preferredSize.width = 150;
    
    function populateDDActions (inSet)
    {
        DDActions.removeAll();
        
        for (var i = 0; i < currentActionSets[inSet].actions.length; i++)
        {
            DDActions.add("item", currentActionSets[inSet].actions);
        }
        DDActions.selection = 0;
    }
    DDActionSet.onChange = function()
    {
        populateDDActions(DDActionSet.selection.index);
    }
    DDActionSet.onChange();
    
    mainGroup.add("statictext", undefined, "");
     
    ButtonGroup = mainGroup.add("group");
    ButtonGroup.orientation = 'row';
    ButtonGroup.alignChildren = 'center';
    ButtonGroup.alignment = 'top';     
            
    buttonRun= ButtonGroup.add("button",undefined, "Run")
    buttonRun.preferredSize.width = ButtonWidth;
    buttonRun.onClick = function()
   {
       var SelectedLayers = getSelectedLayers();
       
        for (var i = 0; i < SelectedLayers.length; i++)
        {
            activeDocument.activeLayer = SelectedLayers;
            doAction(DDActions.selection.text, DDActionSet.selection.text);
            
        }
        OpenOptionsDialog.close()
    }
    
    buttonClose= ButtonGroup.add("button",undefined, "Exit")
    buttonClose.preferredSize.width = ButtonWidth;
    buttonClose.onClick = function() {OpenOptionsDialog.close()}       
    //Show window
  OpenOptionsDialog.center();
  var result = OpenOptionsDialog.show();
}
function getActionSets() 
{  
  var i = 1;  
  var sets = [];  
  while (true) {  
    var ref = new ActionReference();  
    ref.putIndex(cID("ASet"), i);  
    var desc;  
    var lvl = $.level;  
    $.level = 0;  
    try {  
      desc = executeActionGet(ref);  
    } catch (e) {  
      break;    // all done  
    } finally {  
      $.level = lvl;  
    }  
    if (desc.hasKey(cID("Nm  "))) {  
      var set = {};  
      set.index = i;  
      set.name = desc.getString(cID("Nm  "));  
      set.toString = function() { return this.name; };  
      set.count = desc.getInteger(cID("NmbC"));  
      set.actions = [];  
      for (var j = 1; j <= set.count; j++) {  
        var ref = new ActionReference();  
        ref.putIndex(cID('Actn'), j);  
        ref.putIndex(cID('ASet'), set.index);  
        var adesc = executeActionGet(ref);  
        var actName = adesc.getString(cID('Nm  '));  
        set.actions.push(actName);  
      }  
      sets.push(set);  
    }  
    i++;  
  }  
  return sets;  
};  
function getSelectedLayers()
{
  var resultLayers=new Array();
  try{
    var descGrp = new ActionDescriptor();
    var refGrp = new ActionReference();
    refGrp.putEnumerated(cID( "Lyr " ),cID( "Ordn" ),cID( "Trgt" ));
    descGrp.putReference(cID( "null" ), refGrp );
    executeAction( sID( "groupLayersEvent" ), descGrp, DialogModes.NO );
    for (var ix=0;ix<app.activeDocument.activeLayer.layers.length;ix++){resultLayers.push(app.activeDocument.activeLayer.layers[ix])}
    var desc5 = new ActionDescriptor();
    var ref2 = new ActionReference();
    ref2.putEnumerated( cID( "HstS" ), cID( "Ordn" ), cID( "Prvs" ) );
    desc5.putReference( cID( "null" ), ref2 );
    executeAction( cID( "slct" ), desc5, DialogModes.NO );
  } catch (err) { }
  return resultLayers;
}