基本方法

var myDate = new Date();myDate.getYear(); //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

日期时间方法扩展

Date.prototype.isLeapYear 判断闰年

Date.prototype.isLeapYear = function() { 　　return (0==this.getYear()%4&&((this.getYear()%100!=0)||(this.getYear()%400==0))); }

Date.prototype.Format 日期格式化

1         Date.prototype.format = function(format)  2         { 3             var o = { 4                 "M+": this.getMonth() + 1, //month 5                 "d+": this.getDate(),    //day 6                 "H+": this.getHours(),   //hour 7                 "m+": this.getMinutes(), //minute 8                 "s+": this.getSeconds(), //second 9                 "q+": Math.floor((this.getMonth() + 3) / 3),  //quarter10                 "S": this.getMilliseconds() //millisecond11             }12             if (/(y+)/.test(format)) format = format.replace(RegExp.$1,13             (this.getFullYear() + "").substr(4 - RegExp.$1.length));14             for (var k in o) if (new RegExp("(" + k + ")").test(format))15                 format = format.replace(RegExp.$1,16               RegExp.$1.length == 1 ? o[k] :17                 ("00" + o[k]).substr(("" + o[k]).length));18             return format;19         }20

Date.prototype.DateDiff 比较日期差

//+--------------------------------------------------- //| 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))/86400000); return Math.abs(cha); }

daysBetween 日期天数差

//+--------------------------------------------------- //| 比较日期差 dtEnd 格式为日期型或者 有效日期格式字符串 //+--------------------------------------------------- Date.prototype.DateDiff = function(strInterval, dtEnd) { var dtStart = this; if (typeof dtEnd == 'string' )//如果是字符串转换为日期型 { dtEnd = StringToDate(dtEnd); } switch (strInterval) { case 's' :return parseInt((dtEnd - dtStart) / 1000); case 'n' :return parseInt((dtEnd - dtStart) / 60000); case 'h' :return parseInt((dtEnd - dtStart) / 3600000); case 'd' :return parseInt((dtEnd - dtStart) / 86400000); case 'w' :return parseInt((dtEnd - dtStart) / (86400000 * 7)); case 'm' :return (dtEnd.getMonth()+1)+((dtEnd.getFullYear()-dtStart.getFullYear())*12) - (dtStart.getMonth()+1); case 'y' :return dtEnd.getFullYear() - dtStart.getFullYear(); } }

Date.prototype.DateAdd 日期计算

//+--------------------------------------------------- //| 日期计算 //+--------------------------------------------------- Date.prototype.DateAdd = function(strInterval, Number) { var dtTmp = this; switch (strInterval) { case 's' :return new Date(Date.parse(dtTmp) + (1000 * Number)); case 'n' :return new Date(Date.parse(dtTmp) + (60000 * Number)); case 'h' :return new Date(Date.parse(dtTmp) + (3600000 * Number)); case 'd' :return new Date(Date.parse(dtTmp) + (86400000 * Number)); case 'w' :return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number)); case 'q' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number*3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds()); case 'm' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds()); case 'y' :return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds()); } }

Date.prototype.toString 日期转字符串

//+--------------------------------------------------- //| 日期输出字符串，重载了系统的toString方法 //+--------------------------------------------------- Date.prototype.toString = function(showWeek) { var myDate= this; var str = myDate.toLocaleDateString(); if (showWeek) { var Week = ['日','一','二','三','四','五','六']; str += ' 星期' + Week[myDate.getDay()]; } return str; }

Date.prototype.toArray 日期分割为数组

//+--------------------------------------------------- //| 把日期分割成数组 //+--------------------------------------------------- Date.prototype.toArray = function() { var myDate = this; var myArray = Array(); myArray[0] = myDate.getFullYear(); myArray[1] = myDate.getMonth(); myArray[2] = myDate.getDate(); myArray[3] = myDate.getHours(); myArray[4] = myDate.getMinutes(); myArray[5] = myDate.getSeconds(); return myArray; }

Date.prototype.DatePart 取日期的部分信息

//| 取得日期数据信息 //| 参数 interval 表示数据类型 //| y 年 m月 d日 w星期 ww周 h时 n分 s秒 //+--------------------------------------------------- Date.prototype.DatePart = function(interval) { var myDate = this; var partStr=''; var Week = ['日','一','二','三','四','五','六']; switch (interval) { case 'y' :partStr = myDate.getFullYear();break; case 'm' :partStr = myDate.getMonth()+1;break; case 'd' :partStr = myDate.getDate();break; case 'w' :partStr = Week[myDate.getDay()];break; case 'ww' :partStr = myDate.WeekNumOfYear();break; case 'h' :partStr = myDate.getHours();break; case 'n' :partStr = myDate.getMinutes();break; case 's' :partStr = myDate.getSeconds();break; } return partStr; }

Date.prototype.MaxDayOfDate 取日期所在月的最大天数

//+--------------------------------------------------- //| 取得当前日期所在月的最大天数 //+--------------------------------------------------- Date.prototype.MaxDayOfDate = function() { var myDate = this; var ary = myDate.toArray(); var date1 = (new Date(ary[0],ary[1]+1,1)); var date2 = date1.dateAdd(1,'m',1); var result = dateDiff(date1.Format('yyyy-MM-dd'),date2.Format('yyyy-MM-dd')); return result; }

Date.prototype.WeekNumOfYear 判断日期所在年的第几周

//+--------------------------------------------------- //| 取得当前日期所在周是一年中的第几周 //+--------------------------------------------------- Date.prototype.WeekNumOfYear = function() { var myDate = this; var ary = myDate.toArray(); var year = ary[0]; var month = ary[1]+1; var day = ary[2]; document.write('< script language=VBScript\> \n'); document.write('myDate = DateValue(''+month+'-'+day+'-'+year+'') \n'); document.write('result = DatePart('ww', myDate) \n'); document.write(' \n'); return result; }

StringToDate 字符串转日期型

//+--------------------------------------------------- //| 字符串转成日期类型 //| 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd //+--------------------------------------------------- function StringToDate(DateStr) { var converted = Date.parse(DateStr); var myDate = new Date(converted); if (isNaN(myDate)) { //var delimCahar = DateStr.indexOf('/')!=-1?'/':'-'; var arys= DateStr.split('-'); myDate = new Date(arys[0],--arys[1],arys[2]); } return myDate; }

IsValidDate 验证日期有效性

//+--------------------------------------------------- //| 日期合法性验证 //| 格式为：YYYY-MM-DD或YYYY/MM/DD //+--------------------------------------------------- function IsValidDate(DateStr) { var sDate=DateStr.replace(/(^\s+|\s+$)/g,''); //去两边空格; if(sDate=='') return true; //如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为'' //数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式 var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g,''); if (s=='') //说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D { var t=new Date(sDate.replace(/\-/g,'/')); var ar = sDate.split(/[-/:]/); if(ar[0] != t.getYear() || ar[1] != t.getMonth()+1 || ar[2] != t.getDate()) { //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。'); return false; } } else { //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。'); return false; } return true; }

CheckDateTime 完整日期时间检查

//+--------------------------------------------------- //| 日期时间检查 //| 格式为：YYYY-MM-DD HH:MM:SS //+--------------------------------------------------- function CheckDateTime(str) { var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/; var r = str.match(reg); if(r==null)return false; r[2]=r[2]-1; var d= new Date(r[1],r[2],r[3],r[4],r[5],r[6]); if(d.getFullYear()!=r[1])return false; if(d.getMonth()!=r[2])return false; if(d.getDate()!=r[3])return false; if(d.getHours()!=r[4])return false; if(d.getMinutes()!=r[5])return false; if(d.getSeconds()!=r[6])return false; return true; }

Firefox下的兼容处理

Firefox的getYear函数获取到的值是当前年份减去1900的值

 

var today=new Date();

 

date=today.getDate();

 

month=today.getMonth();

 

month=month+1;

 

if(month<=9)

 

month="0"+month;

 

year=today.getYear();

if(year<1900)year+=1900; //Firefox下的兼容处理