Javascript to Unlock All Layers

Hi,

Please try following snippet to unlock all layers and sublayers in Illustartor

function unlockLayers(_layers) {
    for (var i = 0; i < _layers.length; i++) {
        if (_layers[i].locked) {
            _layers[i].locked = false;
        }
        if (_layers[i].layers.length)
            unlockLayers(_layers[i].layers);
    }
}
unlockLayers(app.activeDocument.layers);

Let us know if this helps