var now = new Date(); //当前日期
var nowDayOfWeek = now.getDay(); //今天本周的第几天
var nowDay = now.getDate(); //当前日
var nowMonth = now.getMonth(); //当前月
var nowYear = now.getYear(); //当前年
nowYear += (nowYear < 2000) ? 1900 : 0; //
var lastMonthDate = new Date(); //上月日期
lastMonthDate.setDate(1);
lastMonthDate.setMonth(lastMonthDate.getMonth()-1);
var lastYear = lastMonthDate.getYear();
var lastMonth = lastMonthDate.getMonth();
//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);
}
//获得某月的天数
function getMonthDays(myMonth){
var monthStartDate = new Date(nowYear, myMonth, 1);
var monthEndDate = new Date(nowYear, myMonth + 1, 1);
var days = (monthEndDate - monthStartDate)/(1000 * 60 * 60 * 24);
return days;
}
//获得本季度的开始月份
function getQuarterStartMonth(){
var quarterStartMonth = 0;
if(nowMonth<3){
quarterStartMonth = 0;
}
if(2<6){
quarterStartMonth = 3;
}
if(5<9){
quarterStartMonth = 6;
}
if(nowMonth>8){
quarterStartMonth = 9;
}
return quarterStartMonth;
}
//今天
var getCurrentDate = new Date(nowYear, nowMonth, nowDay);
var getCurrentDate = formatDate(getCurrentDate)
//昨天
var getYesterdayDate = new Date(nowYear, nowMonth, nowDay - 1);
var getYesterdayDate = formatDate(getYesterdayDate);
//获得本周的开始日期
var getWeekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);
var getWeekStartDate = formatDate(getWeekStartDate);
//获得本周的结束日期
var getWeekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek));
var getWeekEndDate = formatDate(getWeekEndDate);
//获得上周的开始日期
var getUpWeekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek -7);
var getUpWeekStartDate = formatDate(getUpWeekStartDate);
//获得上周的结束日期
var getUpWeekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek - 7));
var getUpWeekEndDate = formatDate(getUpWeekEndDate);
//获得本月的开始日期
var getMonthStartDate = new Date(nowYear, nowMonth, 1);
var getMonthStartDate = formatDate(getMonthStartDate);
//获得本月的结束日期
var getMonthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth));
var getMonthEndDate = formatDate(getMonthEndDate);
//获得上月开始时间
var getLastMonthStartDate = new Date(nowYear, lastMonth, 1);
var getLastMonthStartDate = formatDate(getLastMonthStartDate);
//获得上月结束时间
var getLastMonthEndDate = new Date(nowYear, lastMonth, getMonthDays(lastMonth));
var getLastMonthEndDate = formatDate(getLastMonthEndDate);
