Search layers for a layer called XXX and resize to 200%

This might work.

// 2014, use it at your own risk; #target photoshop if (app.documents.length > 0) { var myDocument = app.activeDocument; main (); }; //////////////////////////////////// function main () { // get number of layers; var ref = new ActionReference(); ref.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") ); var applicationDesc = executeActionGet(ref); var theNumber = applicationDesc.getInteger(stringIDToTypeID("numberOfLayers")); // check layers; for (var m = 0; m <= theNumber; m++) { try { var ref = new ActionReference(); //ref.putEnumerated( charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") ); ref.putIndex( charIDToTypeID( "Lyr " ), m); var layerDesc = executeActionGet(ref); var layerSet = layerDesc.getEnumerationValue(stringIDToTypeID("layerSection")); // if not layer group check name; if (layerSet != 2652 && layerSet != 2638) { var theName = layerDesc.getString(stringIDToTypeID('name')); if (theName == "XXX") { selectLayerByIndex(m,false); app.activeDocument.activeLayer.resize(200, 200, AnchorPosition.MIDDLECENTER) } }; } catch (e) {}; }; }; // by mike hale, via paul riggott; // http://forums.adobe.com/message/1944754#1944754 function selectLayerByIndex(index,add){ add = undefined ? add = false:add var ref = new ActionReference();     ref.putIndex(charIDToTypeID("Lyr "), index);     var desc = new ActionDescriptor();     desc.putReference(charIDToTypeID("null"), ref );        if(add) desc.putEnumerated( stringIDToTypeID( "selectionModifier" ), stringIDToTypeID( "selectionModifierType" ), stringIDToTypeID( "addToSelection" ) );       desc.putBoolean( charIDToTypeID( "MkVs" ), false );    try{     executeAction(charIDToTypeID("slct"), desc, DialogModes.NO ); }catch(e){ alert(e.message); } };