let date = new Date();let dateYear = date.getFullYear();             //获取年 let dateMonth = date.getMonth();               //获取月  let dateDate = date.getDate();                 //获取当日let dateDay = date.getDay();                   //获取当日星期数let dateHours = date.getHours();               //获取小时let dateMinutes = date.getMinutes();           //获取分钟let dateSeconds = date.getSeconds();           //获取秒let dateMilliseconds = date.getMilliseconds(); //获取毫秒