1 <script>
2 var now = new Date(); //当前日期
3 var nowDayOfWeek = now.getDay(); //今天本周的第几天
4 var nowDay = now.getDate(); //当前日
5 var nowMonth = now.getMonth(); //当前月
6 var nowYear = now.getYear(); //当前年
7 nowYear += (nowYear < 2000) ? 1900 : 0; //
8
9 //格式化日期：yyyy-MM-dd
10 function formatDate(date) {
11 var myyear = date.getFullYear();
12 var mymonth = date.getMonth()+1;
13 var myweekday = date.getDate();
14
15 if(mymonth < 10){
16 mymonth = "0" + mymonth;
17 }
18 if(myweekday < 10){
19 myweekday = "0" + myweekday;
20 }
21 return (myyear+"-"+mymonth + "-" + myweekday);
22 }
23
24 //获得某月的天数
25 function getMonthDays(myMonth){
26 var monthStartDate = new Date(nowYear, myMonth, 1);
27 var monthEndDate = new Date(nowYear, myMonth + 1, 1);
28 var days = (monthEndDate - monthStartDate)/(1000 * 60 * 60 * 24);
29 return days;
30 }
31
32 //获得本季度的开始月份
33 function getQuarterStartMonth(){
34 var quarterStartMonth = 0;
35 if(nowMonth<3){
36 quarterStartMonth = 0;
37 }
38 if(2<nowMonth && nowMonth<6){
39 quarterStartMonth = 3;
40 }
41 if(5<nowMonth && nowMonth<9){
42 quarterStartMonth = 6;
43 }
44 if(nowMonth>8){
45 quarterStartMonth = 9;
46 }
47 return quarterStartMonth;
48 }
49
50 //获得本周的开始日期
51 function getWeekStartDate() {
52 var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);
53 return formatDate(weekStartDate);
54 }
55
56 //获得本周的结束日期
57 function getWeekEndDate() {
58 var weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek));
59 return formatDate(weekEndDate);
60 }
61
62 //获得本月的开始日期
63 function getMonthStartDate(){
64 var monthStartDate = new Date(nowYear, nowMonth, 1);
65 return formatDate(monthStartDate);
66 }
67
68 //获得本月的结束日期
69 function getMonthEndDate(){
70 var monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth));
71 return formatDate(monthEndDate);
72 }
73
74 //获得本季度的开始日期
75 function getQuarterStartDate(){
76
77 var quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1);
78 return formatDate(quarterStartDate);
79 }
80
81 //或的本季度的结束日期
82 function getQuarterEndDate(){
83 var quarterEndMonth = getQuarterStartMonth() + 2;
84 var quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth));
85 return formatDate(quarterStartDate);
86 }
87
88 alert(getQuarterEndDate());
89 </script>
