function scr_layer_instances_visible(arg0, arg1)
{
    var _elements = layer_get_all_elements(arg0);
    for (var i = 0; i < array_length(_elements); i++)
    {
        if (layer_get_element_type(_elements[i]) == 2)
        {
            var layerelement = _elements[i];
            var inst = layer_instance_get_instance(layerelement);
            inst.visible = arg1;
        }
    }
}