SOURCE

function writeDocument(variable) {
    document.write(variable + "<br/>");
} 

writeDocument("定义时间对象--------------------");
var oToday=new Date();

writeDocument("获取年，月，日，时，分，秒，毫秒--------");
writeDocument("年："+oToday.getFullYear());
writeDocument("月："+oToday.getMonth());
writeDocument("日："+oToday.getDay());
writeDocument("时："+oToday.getHours());
writeDocument("分："+oToday.getMinutes());
writeDocument("秒："+oToday.getSeconds());
writeDocument("毫秒："+oToday.getMilliseconds());

writeDocument("设置年 月 星期 日 时 分 秒 毫秒"); 
var oTime=new Date();

oTime.setFullYear(2019);
writeDocument("年："+oTime.getFullYear());
oTime.setMonth(6);
writeDocument("月："+oTime.getMonth());
oTime.setDate(6);
writeDocument("日："+oTime.getDate());
oTime.setHours(6);
writeDocument("时："+oTime.getHours());
oTime.setMinutes(6);
writeDocument("分："+oTime.getMinutes());
oTime.setSeconds(6);
writeDocument("秒："+oTime.getSeconds());
oTime.setMilliseconds(666);
writeDocument("毫秒："+oTime.getMilliseconds());

var weeks=["星期天","星期一","星期二","星期三","星期四","星期五","星期六"];
writeDocument