SOURCE

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

writeDocument("定义一个时间对象--------------");

var oToday = new Date();
writeDocument(oToday);

writeDocument("获取时间对象的年，月，日，时，分，秒--------------");

writeDocument("年："+oToday.getFullYear());
writeDocument("月："+(oToday.getMonth()+1));
writeDocument("日："+oToday.getDate());
writeDocument("时："+oToday.getHours());
writeDocument("分："+oToday.getMinutes());
writeDocument("秒："+oToday.getSeconds());

writeDocument("设置时间对象的年，月，日，时，分，秒（2019-6-1 11：30：58 888--------------");

var oMyBirthday = new Date();
oMyBirthday.setFullYear(2019);
writeDocument("年："+oMyBirthday.getFullYear());
oMyBirthday.setMonth(5);
writeDocument("月："+(oMyBirthday.getMonth()+1));
oMyBirthday.setDate(1);
writeDocument("日："+oMyBirthday.getDate());
oMyBirthday.setHours(11);
writeDocument("时："+oMyBirthday.getHours());
oMyBirthday.setMinutes(30);
writeDocument("分："+oMyBirthday.getMinutes());
oMyBirthday.setSeconds(58);
writeDocument("秒："+oMyBirthday.getSeconds());
oMyBirthday.setMilliseconds(888);
writeDocument("毫秒："+oMyBirthday.getMilliseconds());


writeDocument("获取星期几-------");
writeDocument("今天是星期"+oToday.getDay());

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

writeDocument("今天是"+week[oToday.getDay()]);
writeDocument("请你打印'2019年6月1日 星期六 15：59：59：99'---------");

var oPrintDate = new Date(2019,5,1,15,59,59,99);
document.write(oPrintDate.getFullYear()+"年"+(oPrintDate.getMonth()+1)+"月"+oPrintDate.getDate()+"日");
document.write("  "+week[oPrintDate.getDay()]);
document.write(oPrintDate.getHours()+":"+oPrintDate.getMinutes());
document.write(":"+oPrintDate.getSeconds()+":"+oPrintDate.getMilliseconds());