loadCallback is fired before loading iframe

[devochki]

When I use loadCallback event, I notice that it is fired before loading iframe. Maybe it will be better to use something like this: h.on('load', function(){k(a.loadCallback);}); instead of directly call event.
Maybe it will be good to add id of iframe, so it will be easy referrable outside bPopup.
Also, is there a way to auto-size iframe? I try to change its height at loadCallback function, but this approach is not very clear as I think.

Thank you for support.