Date.prototype.Format = function (fmt) {
var o =
{
"M+": this.getMonth() + 1, //月份
"d+": this.getDate(), //日
"h+": this.getHours(), //小时
"m+": this.getMinutes(), //分
"s+": this.getSeconds(), //秒
"q+": Math.floor((this.getMonth() + 3) / 3), //季度
"S": this.getMilliseconds() //毫秒
};
if (/(y+)/.test(fmt))
fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
for (var k in o)
if (new RegExp("(" + k + ")").test(fmt))
fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) ? (o[k]) : (("00" + o[k]).substr(("" + o[k]).length)));
return fmt;
}
Date.prototype.addDays = function (d) {
this.setDate(this.getDate() + d);
};
Date.prototype.addWeeks = function (w) {
this.addDays(w * 7);
};
Date.prototype.addMonths = function (m) {
var d = this.getDate();
this.setMonth(this.getMonth() + m);
if (this.getDate() < d)
this.setDate(0);
};
Date.prototype.addYears = function (y) {
var m = this.getMonth();
this.setFullYear(this.getFullYear() + y);
if (m < this.getMonth()) {
this.setDate(0);
}
};
var today = new Date();
alert(today.Format("yyyy-MM-dd"));