javascript - different times shown for different users of our site -

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we seeing issues on our site in different times being shown different users.

so if user logs site, pull time server , quick calculation determine how time left in auction , display that. once page loaded using java script setinterval() method. @ each 1000 milliseconds subtract 1000 milliseconds time difference value.

when second user logs site , goes same auction there time difference second user 5 6 seconds 20 seconds.

wondering if others have run issue , have been able determine solution.


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