Googling hik-online I found this thread which I started myself over half year ago. Since then Hikvision has updated all their softwares (iVMS-4200 for PC and Mac, iVMS-4500 for smartphones, and iVMS-4500 HD for tablets) and now it is possible to connect a hik-online DVR, NVR, IP camera, etc. from web browser and any client.
I wrote two posts on our blog explaining how to configure and use it, they are in spanish but hopefully they will help someone.http://www.securamente.com/como-utiliza ... hikvision/http://www.securamente.com/como-conecta ... ente-ivms/
Everything that can be done with hik-online.com can also be done with hikvisioneurope.net, in fact I think euro costumers should be using hikvisioneurope.net now, but since I started using hik-online before they had hikvisioneurope.net I am sticking with it just so I do not need to reconfigure all my machines.