js Date对象扩展
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))/86400000);???
??? return Math.abs(cha);??
}??
??
??
//+---------------------------------------------------??
//| 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());??
??? }??
}??
??
//+---------------------------------------------------??
//| 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();??
??? }??
}??
??
//+---------------------------------------------------??
//| 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;??
}??
??
//+---------------------------------------------------??
//| 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+$)/g,''); //去两边空格;???
??? if(sDate=='') return true;???
??? //如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为''???
??? //数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式???
??? var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g,'');???
??? if (s=='') //说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D???
??? {???
??????? var t=new Date(sDate.replace(/\-/g,'/'));???
??????? var ar = sDate.split(/[-/:]/);???
??????? if(ar[0] != t.getYear() || ar[1] != t.getMonth()+1 || ar[2] != t.getDate())???
??????? {???
??????????? //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');???
??????????? return false;???
??????? }???
??? }???
??? else???
??? {???
??????? //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');???
??????? return false;???
??? }???
??? return true;???
}???
??
//+---------------------------------------------------??
//| 日期时间检查??
//| 格式为：YYYY-MM-DD HH:MM:SS??
//+---------------------------------------------------??
function CheckDateTime(str)??
{???
??? var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/;???
??? 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;???
}???
??
//+---------------------------------------------------??
//| 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;??
}??
??
//+---------------------------------------------------??
//| 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;??
}??
??
//+---------------------------------------------------??
//| 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;??
}??
??
//+---------------------------------------------------??
//| 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;??
}??
??
//+---------------------------------------------------??
//| 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;??
