<action autorun="onstart" type="Javascript"><![CDATA[
    var layer = krpano.get("layer[ANY_NAME_OR_INDEX]");
    var attributes = layer.getattributes();
    for (var i=0; i < attributes.length; i++)
    {
        var attrib = attributes[i];
        var value = layer[attrib];
        console.log(attrib + "=" + value);
    }
]]></action>