Js 获取当前月的天数

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

function getDays() {             //构造当前日期对象             var date = new Date();               //获取年份             var year = date.getFullYear();               //获取当前月份             var mouth = date.getMonth() + 1;               //定义当月的天数；             var days;               //当月份为二月时，根据闰年还是非闰年判断天数             if (mouth == 2) {                 days = year % 4 == 0 ? 29 : 28;               }             else if (mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 || mouth == 8 || mouth == 10 || mouth == 12) {                 //月份为：1,3,5,7,8,10,12 时，为大月.则天数为31；                 days = 31;             }             else {                 //其他月份，天数为：30.                 days = 30;               }             return days;         } <br><br><br>

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