js获取当前日期一年的第几周
获取当前日期一年中的第几周
1 function theWeek() { 2 var totalDays = 0; 3 now = new Date(); 4 years = now.getYear() 5 if (years < 1000) 6 years += 1900 7 var days = new Array(12); 8 days[0] = 31; 9 days[2] = 31; 10 days[3] = 30; 11 days[4] = 31; 12 days[5] = 30; 13 days[6] = 31; 14 days[7] = 31; 15 days[8] = 30; 16 days[9] = 31; 17 days[10] = 30; 18 days[11] = 31; 19 //判断是否为闰年，针对2月的天数进行计算 20 if (Math.round(now.getYear() / 4) == now.getYear() / 4) { 21 days[1] = 29 22 } else { 23 days[1] = 28 24 } 25 if (now.getMonth() == 0) { 26 totalDays = totalDays + now.getDate(); 27 } else { 28 var curMonth = now.getMonth(); 29 for (var count = 1; count <= curMonth; count++) { 30 totalDays = totalDays + days[count - 1]; 31 } 32 totalDays = totalDays + now.getDate(); 33 } 34 //得到第几周 35 var week = Math.round(totalDays / 7); 36 return week; 37 }
