//1.  得到本月一號為開始時間，得到當前時間減兩天為結束時間
function SetDayDate() {
	//當前時間減兩天
	var dataValue = new Date(new Date().getTime() - (1000 * 60 * 60 * 48));
    //（1000*60*60*24）是1千毫秒（是1秒）乘60（是1分）乘60（是1小時）*24（是一天）加減一天把前邊的-+換一下就行。
	
	var year = dataValue.getFullYear();
	var month = dataValue.getMonth() + 1;
	var day = dataValue.getDate();

	if (month < 10) {
		month = '0' + month;
	}
	if (day < 10) {
		if (day < 1) {
			day = '01';
		} else {
			day = '0' + day;
		}
	}
	var stime = year + '/' + month + '/' + '01';  //開始時間
	var etime = year + '/' + month + '/' + day;   //結束時間
}

   

//2.  得到當前時間的上週時間範圍
function SetWeekDate() {
	var dataValue = new Date();

	var year = dataValue.getFullYear();
	var month = dataValue.getMonth() + 1;
	var day = dataValue.getDate();

	var thisWeekStart; //本週週一的時間
	if (dataValue.getDay() == 0) {  //周天的情況；
		thisWeekStart = (new Date(year + '/' + month + '/' + day)).getTime() - ((dataValue.getDay()) + 6) * 86400000;
	} else {
		thisWeekStart = (new Date(year + '/' + month + '/' + day)).getTime() - ((dataValue.getDay()) - 1) * 86400000;
	}

	//獲得上週時間
	var prevWeekStart = thisWeekStart - 7 * 86400000;//上週週一的時間
	var prevWeekEnd = thisWeekStart - 1 * 86400000;//上週週日的時間

	var stime = formatDate(new Date(prevWeekStart)); //開始時間
	var etime = formatDate(new Date(prevWeekEnd));   //結束時間

}

//3.  得到當前時間的上月時間範圍
function SetMonthDate() {
	var dataValue = new Date()；

	var currentYear = dataValue.getFullYear();
	var currentMonth = dataValue.getMonth();
	var prevCurrentYear = 0, prevCurrentMonth = 0;

	if (currentMonth == 0) {
		prevCurrentYear = currentYear - 1;
		prevCurrentMonth = 12;
	} else {
		prevCurrentYear = currentYear;
		prevCurrentMonth = currentMonth - 1;
	}
	var prevmonthLastday = (new Date(currentYear, currentMonth, 1)).getTime() - 86400000;

	var stime = formatDate(new Date(prevCurrentYear, prevCurrentMonth, 1));  //開始時間
	var etime = formatDate(new Date(prevmonthLastday));                      //結束時間
}
	
	
//格式化日期：yyyy/MM/dd
function formatDate(date) {
	var myyear = date.getFullYear();
	var mymonth = date.getMonth() + 1;
	var myweekday = date.getDate();

	if (mymonth < 10) {
		mymonth = "0" + mymonth;
	}
	if (myweekday < 10) {
		myweekday = "0" + myweekday;
	}
	return (myyear + "/" + mymonth + "/" + myweekday);
}