synchronization - good precision for sync time with NTP over JavaScript -


i want synchronize time ntp on javascript. client can normal pc or smartphone or tablet. connection wlan or 3g, etc.

i found questions , sites

first , second links using timestamp server: http://json-time.appspot.com/time.json date object has second precision. want better precision, if possible ~ 10 ms. (i know precision depends on connection , round trip time)
edit: 10 ms impossible. want precision offset.

the third link shows javascript library, not use direct connection ntp server. solution of fourth link near want. synchronizing 2 clients through 'own' server. there way synchronize directly ntp pool pool.ntp.org ?

an ntp client servos computer's own internal clock resolution. client must estimate udp round trip times , change inernal clock rate ,slowly, minimize average error.


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