1. amend the problem that the value of the multi-screen duration and full screen duration at local site can't be saved
2. amend the problem that the full screen duration on IE browser only shows 3 seconds
3. amend the problem that the NVR doesn't show up the event log on IE browser after backup
4. amend the problem that the massage "connected failed!" pops up after clicking the item "Network upgrade" at local site
5. amend the problem that the NVR cant connect to the internet through STREAM ONLY at local site
6. amend the problem that the DPTZ operation through the app EagleEyes of IP camera doesnt function well
7. amend the problem of playback status error on website at times
