Unlocking Background Layer with lots of other layers

The script below will check all the layers in a document and make sure that there is no layer locking of any kind. Will work with layers in layersets and unlock layersets.

var topLayer = app.activeDocument.layers[0];
app.activeDocument.activeLayer = topLayer;
do{
    unlockLayer();
    selectLayerBelow();
}while(topLayer != app.activeDocument.activeLayer)
function unlockLayer(){
    if(app.activeDocument.activeLayer.isBackgroundLayer ) app.activeDocument.activeLayer.name = 'From Background';
    if(app.activeDocument.activeLayer.allLocked) app.activeDocument.activeLayer.allLocked = false;
    if(app.activeDocument.activeLayer.pixelsLocked) app.activeDocument.activeLayer.pixelsLocked = false;
    if(app.activeDocument.activeLayer.positionLocked) app.activeDocument.activeLayer.positionLocked = false;
    if(app.activeDocument.activeLayer.transparentPixelsLocked) app.activeDocument.activeLayer.transparentPixelsLocked = false;
};
function selectLayerBelow(){
    var desc = new ActionDescriptor();
        var ref = new ActionReference();
        ref.putEnumerated( charIDToTypeID( "Lyr " ), charIDToTypeID( "Ordn" ), charIDToTypeID( "Bckw" ) );
    desc.putReference( charIDToTypeID( "null" ), ref );
    desc.putBoolean( charIDToTypeID( "MkVs" ), false );
    executeAction( charIDToTypeID( "slct" ), desc, DialogModes.NO );
};