var myDate = new Date();
myDate.getYear(); //获取当前年份(2位)
myDate.getFullYear(); //获取完整的年份(4位,1970-????)
myDate.getMonth(); //获取当前月份(0-11,0代表1月)
myDate.getDate(); //获取当前日(1-31)
myDate.getDay(); //获取当前星期X(0-6,0代表星期天)
myDate.getTime(); //获取当前时间(从1970.1.1开始的毫秒数)
myDate.getHours(); //获取当前小时数(0-23)
myDate.getMinutes(); //获取当前分钟数(0-59)
myDate.getSeconds(); //获取当前秒数(0-59)
myDate.getMilliseconds(); //获取当前毫秒数(0-999)
myDate.toLocaleDateString(); //获取当前日期
var mytime=myDate.toLocaleTimeString(); //获取当前时间
myDate.toLocaleString( ); //获取日期与时间

Date
.prototype.isLeapYear 判断闰年
Date.prototype.Format 日期格式化
Date.prototype.DateAdd 日期计算
Date.prototype.DateDiff 比较日期差
Date.prototype.toString 日期转字符串
Date.prototype.toArray 日期分割为数组
Date.prototype.DatePart 取日期的部分信息
Date.prototype.MaxDayOfDate 取日期所在月的最大
天数
Date.prototype.WeekNumOfYear 判断日期所在年的第几周
StringToDate 字符串转日期型
IsValidDate 验证日期有效性
CheckDateTime 完整日期时间检查
daysBetween 日期天数差

//--------------------------------------------------- 
// 判断闰年 
//--------------------------------------------------- 
Date.prototype.isLeapYear = function() 
{ 
 return (0==this.getYear()%4&&((this.getYear()%100!=0)||(this.getYear()%400==0))); 
} 
 
//--------------------------------------------------- 
// 日期格式化 
// 格式 YYYY/yyyy/YY/yy 表示年份 
// MM/M 月份 
// W/w 星期 
// dd/DD/d/D 日期 
// hh/HH/h/H 时间 
// mm/m 分钟 
// ss/SS/s/S 秒 
//--------------------------------------------------- 
Date.prototype.Format = function(formatStr) 
{ 
 var str = formatStr; 
 var Week = ['日','一','二','三','四','五','六']; 
 
 str=str.replace(/yyyy|YYYY/,this.getFullYear()); 
 str=str.replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100)); 
 
 str=str.replace(/MM/,this.getMonth()>9?this.getMonth().toString():'0' + this.getMonth()); 
 str=str.replace(/M/g,this.getMonth()); 
 
 str=str.replace(/w|W/g,Week[this.getDay()]); 
 
 str=str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate()); 
 str=str.replace(/d|D/g,this.getDate()); 
 
 str=str.replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0' + this.getHours()); 
 str=str.replace(/h|H/g,this.getHours()); 
 str=str.replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0' + this.getMinutes()); 
 str=str.replace(/m/g,this.getMinutes()); 
 
 str=str.replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0' + this.getSeconds()); 
 str=str.replace(/s|S/g,this.getSeconds()); 
 
 return str; 
} 
 
//+--------------------------------------------------- 
//| 求两个时间的天数差 日期格式为 YYYY-MM-dd 
//+--------------------------------------------------- 
function daysBetween(DateOne,DateTwo) 
{ 
 var OneMonth = DateOne.substring(5,DateOne.lastIndexOf ('-')); 
 var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf ('-')+1); 
 var OneYear = DateOne.substring(0,DateOne.indexOf ('-')); 
 
 var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf ('-')); 
 var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf ('-')+1); 
 var TwoYear = DateTwo.substring(0,DateTwo.indexOf ('-')); 
 
 var cha=((Date.parse(OneMonth+'/'+OneDay+'/'+OneYear)- Date.parse(TwoMonth+'/'+TwoDay+'/'+TwoYear))/800000); 
 return Math.abs(cha); 
} 
 
 
//+--------------------------------------------------- 
//| 日期计算 
//+--------------------------------------------------- 
Date.prototype.DateAdd = function(strInterval, Number) { 
 var dtTmp = this; 
 switch (strInterval) {