JavaScript: Round timestamp by 3 seconds

alert( Math.ceil(new Date().getTime()/1000) );

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This returns a timestamp, to the second.  I want it rounded up to the closest 3 seconds.  It should remain the same for 3 seconds then jump up 3 more seconds.
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leakim971Connect With a Mentor PluritechnicianCommented:
alert( Math.ceil(new Date().getTime()/3000)*3 );
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