You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
59 lines
1.5 KiB
59 lines
1.5 KiB
Date.prototype.addMonth = function(addMonth) {
|
|
var y = this.getFullYear();
|
|
var m = this.getMonth();
|
|
var nextY = y;
|
|
var nextM = m;
|
|
//如果当前月+增加的月>11 这里之所以用11是因为 js的月份从0开始
|
|
if (m + addMonth > 11) {
|
|
nextY = y + 1;
|
|
nextM = parseInt(m + addMonth) - 12;
|
|
} else {
|
|
nextM = this.getMonth() + addMonth;
|
|
}
|
|
var daysInNextMonth = Date.daysInMonth(nextY, nextM);
|
|
var day = this.getDate();
|
|
if (day > daysInNextMonth) {
|
|
day = daysInNextMonth;
|
|
}
|
|
return new Date(nextY, nextM, day);
|
|
};
|
|
|
|
//计算当前月最大天数
|
|
Date.daysInMonth = function(year, month) {
|
|
if (month == 1) {
|
|
if (year % 4 == 0 && year % 100 != 0) return 29;
|
|
else return 28;
|
|
} else if ((month <= 6 && month % 2 == 0) || (month > 6 && month % 2 == 1))
|
|
return 31;
|
|
else return 30;
|
|
};
|
|
|
|
Date.prototype.format = function(format) {
|
|
var date = {
|
|
"M+": this.getMonth() + 1,
|
|
"d+": this.getDate(),
|
|
"h+": this.getHours(),
|
|
"m+": this.getMinutes(),
|
|
"s+": this.getSeconds(),
|
|
"q+": Math.floor((this.getMonth() + 3) / 3),
|
|
"S+": this.getMilliseconds()
|
|
};
|
|
if (/(y+)/i.test(format)) {
|
|
format = format.replace(
|
|
RegExp.$1,
|
|
(this.getFullYear() + "").substr(4 - RegExp.$1.length)
|
|
);
|
|
}
|
|
for (var k in date) {
|
|
if (new RegExp("(" + k + ")").test(format)) {
|
|
format = format.replace(
|
|
RegExp.$1,
|
|
RegExp.$1.length == 1
|
|
? date[k]
|
|
: ("00" + date[k]).substr(("" + date[k]).length)
|
|
);
|
|
}
|
|
}
|
|
return format;
|
|
};
|