lunar.js

javascript实现显示日期功能包括阳历和农历的年月日 以及星座 还有弹簧式导航的源码

   for(i=1900; i<2050 && offset>0; i++) { temp=lYearDays(i); offset-=temp; }

   if(offset<0) { offset+=temp; i--; }

   this.year = i;

   leap = leapMonth(i); //闰哪个月
   this.isLeap = false;

   for(i=1; i<13 && offset>0; i++) {
      //闰月
      if(leap>0 && i==(leap+1) && this.isLeap==false)
         { --i; this.isLeap = true; temp = leapDays(this.year); }
      else
         { temp = monthDays(this.year, i); }

      //解除闰月
      if(this.isLeap==true && i==(leap+1)) this.isLeap = false;

      offset -= temp;
   }

   if(offset==0 && leap>0 && i==leap+1)
      if(this.isLeap)
         { this.isLeap = false; }
      else
         { this.isLeap = true; --i; }

   if(offset<0){ offset += temp; --i; }

   this.month = i;
   this.day = offset + 1;
}

//==============================传回国历 y年某m+1月的天数
function solarDays(y,m) {
   if(m==1)
      return(((y%4 == 0) && (y%100 != 0) || (y%400 == 0))? 29: 28);
   else
      return(solarMonth[m]);
}
//============================== 传入 offset 传回干支, 0=甲子
function cyclical(num) {
   return(Gan[num%10]+Zhi[num%12]);
}

//============================== 月历属性
function calElement(sYear,sMonth,sDay,week,lYear,lMonth,lDay,isLeap,cYear,cMonth,cDay) {

      this.isToday    = false;
      //国历
      this.sYear      = sYear;   //西元年4位数字
      this.sMonth     = sMonth;  //西元月数字
      this.sDay       = sDay;    //西元日数字
      this.week       = week;    //星期, 1个中文
      //农历
      this.lYear      = lYear;   //西元年4位数字
      this.lMonth     = lMonth;  //农历月数字
      this.lDay       = lDay;    //农历日数字
      this.isLeap     = isLeap;  //是否为农历闰月?
      //八字
      this.cYear      = cYear;   //年柱, 2个中文
      this.cMonth     = cMonth;  //月柱, 2个中文
      this.cDay       = cDay;    //日柱, 2个中文

      this.color      = '';

      this.lunarFestival = ''; //农历节日
      this.solarFestival1 = ''; //国历节日1
	  this.solarFestival2 = ''; //国历节日2
	  this.solarFestival3 = ''; //国历节日3
      this.solarTerms = ''; //节气
}

//===== 某年的第n个节气为几日(从0小寒起算)
function sTerm(y,n) {
   var offDate = new Date( ( 31556925974.7*(y-1900) + sTermInfo[n]*60000  ) + Date.UTC(1900,0,6,2,5) );
   return(offDate.getUTCDate());
}

//============================== 传回月历物件 (y年,m+1月)
/*
功能说明: 传回整个月的日期资料物件
使用方式: OBJ = new calendar(年,零起算月);
  OBJ.length      传回当月最大日
  OBJ.firstWeek   传回当月一日星期
  由 OBJ[日期].属性名称 即可取得各项值
  OBJ[日期].isToday  传回是否为今日 true 或 false
  其他 OBJ[日期] 属性参见 calElement() 中的注解
*/
function calendar(y,m) {

   var sDObj, lDObj, lY, lM, lD=1, lL, lX=0, tmp1, tmp2, tmp3;
   var cY, cM, cD; //年柱,月柱,日柱
   var lDPOS = new Array(3);
   var n = 0;
   var firstLM = 0;

   sDObj = new Date(y,m,1,0,0,0,0);    //当月一日日期


   this.length    = solarDays(y,m);    //国历当月天数
   this.firstWeek = sDObj.getDay();    //国历当月1日星期几

   ////////年柱 1900年春分后为庚子年(60进制36)
   if(m<2) cY=cyclical(y-1900+36-1);
   else cY=cyclical(y-1900+36);
   var term2=sTerm(y,2); //立春日期

   ////////月柱 1900年1月小寒以前为 丙子月(60进制12)
   var firstNode = sTerm(y,m*2) //传回当月「节」为几日开始
   cM = cyclical((y-1900)*12+m+12);

   //当月一日与 1900/1/1 相差天数
   //1900/1/1与 1970/1/1 相差25567日, 1900/1/1 日柱为甲戌日(60进制10)
   var dayCyclical = Date.UTC(y,m,1,0,0,0,0)/86400000+25567+10;

   for(var i=0;i<this.length;i++) {

      if(lD>lX) {
         sDObj = new Date(y,m,i+1);    //当月一日日期
         lDObj = new Lunar(sDObj);     //农历
         lY    = lDObj.year;           //农历年
         lM    = lDObj.month;          //农历月
         lD    = lDObj.day;            //农历日
         lL    = lDObj.isLeap;         //农历是否闰月
         lX    = lL? leapDays(lY): monthDays(lY,lM); //农历当月最后一天

         if(n==0) firstLM = lM;
         lDPOS[n++] = i-lD+1;
      }

      //依节气调整二月分的年柱, 以春分为界
      if(m==1 && (i+1)==term2) cY=cyclical(y-1900+36);
      //依节气月柱, 以「节」为界
      if((i+1)==firstNode) cM = cyclical((y-1900)*12+m+13);
      //日柱
      cD = cyclical(dayCyclical+i);

      this[i] = new calElement(y, m+1, i+1, nStr1[(i+this.firstWeek)%7],
                               lY, lM, lD++, lL,
                               cY ,cM, cD );
   }

   //节气
   tmp1=sTerm(y,m*2)-1;
   tmp2=sTerm(y,m*2+1)-1;
   this[tmp1].solarTerms = solarTerm[m*2];
   this[tmp2].solarTerms = solarTerm[m*2+1];
   //if(m==3) this[tmp1].color = 'red'; //清明颜色

   //国历节日
   for(i in sFtv)
      if(sFtv[i].match(/^(\d{2})(\d{2})([\s\*])(.+)$/))
         if(Number(RegExp.$1)==(m+1)) {
            this[Number(RegExp.$2)-1].solarFestival1 += RegExp.$4;
            //if(RegExp.$3=='*') this[Number(RegExp.$2)-1].color = 'red';
         }

   //月周节日
   for(i in wFtv)
      if(wFtv[i].match(/^(\d{2})(\d)(\d)([\s\*])(.+)$/))
         if(Number(RegExp.$1)==(m+1)) {
            tmp1=Number(RegExp.$2);
            tmp2=Number(RegExp.$3);
            if(tmp1<5)
               this[((this.firstWeek>tmp2)?7:0) + 7*(tmp1-1) + tmp2 - this.firstWeek].solarFestival2 += RegExp.$5;
            else {
               tmp1 -= 5;
               tmp3 = (this.firstWeek+this.length-1)%7; //当月最后一天星期?
               this[this.length - tmp3 - 7*tmp1 + tmp2 - (tmp2>tmp3?7:0) - 1 ].solarFestival2 += RegExp.$5;
            }
         }

   //农历节日
   for(i in lFtv)
      if(lFtv[i].match(/^(\d{2})(.{2})([\s\*])(.+)$/)) {
         tmp1=Number(RegExp.$1)-firstLM;
         if(tmp1==-11) tmp1=1;
         if(tmp1 >=0 && tmp1<n) {
            tmp2 = lDPOS[tmp1] + Number(RegExp.$2) -1;
            if( tmp2 >= 0 && tmp2<this.length && this[tmp2].isLeap!=true) {
               this[tmp2].lunarFestival += RegExp.$4;
               //if(RegExp.$3=='*') this[tmp2].color = 'red';
            }
         }
      }

   //复活节只出现在3或4月
   if(m==2 || m==3) {
      var estDay = new easter(y);
      if(m == estDay.m)
         this[estDay.d-1].solarFestival3 = this[estDay.d-1].solarFestival3+'复活节';// Easter Sunday';
   }
}

//======================================= 传回该年的复活节(春分后第一次满月周后的第一主日)
function easter(y) {

   var term2=sTerm(y,5); //取得春分日期
   var dayTerm2 = new Date(Date.UTC(y,2,term2,0,0,0,0)); //取得春分的国历日期物件(春分一定出现在3月)
   var lDayTerm2 = new Lunar(dayTerm2); //取得取得春分农历

   if(lDayTerm2.day<15) //取得下个月圆的相差天数
      var lMlen= 15-lDayTerm2.day;
   else
      var lMlen= (lDayTerm2.isLeap? leapDays(y): monthDays(y,lDayTerm2.month)) - lDayTerm2.day + 15;

   //一天等于 1000*60*60*24 = 86400000 毫秒
   var l15 = new Date(dayTerm2.getTime() + 86400000*lMlen ); //求出第一次月圆为国历几日
   var dayEaster = new Date(l15.getTime() + 86400000*( 7-l15.getUTCDay() ) ); //求出下个周日

   this.m = dayEaster.getUTCMonth();
   this.d = dayEaster.getUTCDate();

}

///////////////////////////////////////////////////////////////////////////////

var cld;

function drawCld(SY,SM,sD) {
	
	var s1,s2,s3,s4,s5,lObj='',yDisplay;
	cld = new calendar(SY,SM);
	
	//显示农历年、属相
	yDisplay=LunarDate(SY,SM,sD);
	//yDisplay = cyclical(SY-1900+36) + '年 '+ Animals[(SY-4)%12] + ' ';
	
	sD--;
	
	if(sD>-1 && sD<cld.length) { //日期内
		
		s1 = cld[sD].lunarFestival;
		if(s1.length>0) //农历节日
			lObj += ' ' + s1.fontcolor('#FF3BEF');
		
		s2 = cld[sD].solarFestival1;
		if( s2.length>0 && (s1.length + s2.length) <= 8) //国历节日1
			lObj += ' ' + s2.fontcolor('#8FB4FF');
			
		s3 = cld[sD].solarFestival2;
		if( s3.length>0 && (s1.length + s2.length + s3.length) <= 8) //国历节日2
			lObj += ' ' + s3.fontcolor('#8FB4FF');
		
		s4 = cld[sD].solarFestival3;
		if( s4.length>0 && (s1.length + s2.length + s3.length + s4.length) <= 8) //国历节日3
			lObj += ' ' + s4.fontcolor('#8FB4FF');
	
		s5 = cld[sD].solarTerms;
		if( s5.length>0 && (s1.length + s2.length + s3.length + s4.length + s5.length) <= 8 ) //廿四节气
			lObj += ' ' + s5.fontcolor('limegreen');
			
	}
	else  //非日期
		lObj = '';

	document.write( yDisplay + lObj );
}

var Today = new Date();
var tY = Today.getFullYear();
var tM = Today.getMonth();
var tD = Today.getDate();
drawCld(tY,tM,tD); //可传入任意日期，如2007.6.24为 drawCld(2007,5,24);