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dateObject.getMilliseconds()

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<script type="text/javascript">

var d = new Date()
document.write(d.getMilliseconds())

</script>

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<script type="text/javascript">

var born = new Date("July 21, 1983 01:15:00")
document.write(born.getMilliseconds())

</script>

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TIY

getMilliseconds()
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