JavaScript – Create new Group above active Layer/Group

Thank you... but it does not work...

The new Group is always on Top

Try the following

function main () {
	var myDoc = app.activeDocument;
	var setNames = myList.selection;
	for (i=0; i<setNames.length; i++) {
		createNewSet(myDoc, setNames[i]);
	}
}

var aLayer = app.activeDocument.activeLayer
function createNewSet(myDoc, setName) {
	try {
		var mySets = myDoc.layerSets;
		var newSet = mySets.add();
		if ( setName ) {
			newSet.name = setName;
		}
		newSet.move(aLayer, ElementPlacement.PLACEBEFORE)
		myDoc.activeLayerSet = newSet;
	} catch (e) {

	}
}

-Manan