<!DOCTYPE html>charset="utf-8"W3Cschool教程(w3cschool.cn)id="demo"单击按钮按照UTC显示给定时间的毫秒数onclick="myFunction()"点我function myFunction(){var d = new Date("July 21, 1983 01:15:00:195");var x = document.getElementById("demo");x.innerHTML=d.getUTCMilliseconds();}