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<!DOCTYPE html>
<html>
<body>
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<h2>JavaScript getMilliseconds()</h2>
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<p>getMilliseconds() 方法以数字（0-999）的形式返回日期的毫秒数：</p>
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<p id="demo"></p>
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<script>
var d = new Date();
document.getElementById("demo").innerHTML = d.getMilliseconds();
</script>
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</body>
</html>
​