code: function (week, today) {
  		var now = new Date();
  		if (today) {
  			now.setDate(today);
  		}
  		week = 7 - (week || now.getDay());
  
  		return new Date(now.getTime() + ONE_DAY_MILLISECONDS * week);
  	}
docs: /*
  today 代表目标日期，如果没有这个参数默认取“今天” week
  代表要取的下一个星期几，如果没有这个参数默认取下一个星期天