谁能给份此类万年历的算法思想？http://www.eccxx.com/wnl.htm

Question

<SCRIPT language=JavaScript>
<!--
/******************
日期资料
*******************
var lunarInfo=new Array(
0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,0x055d2,
0x04ae0,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,0x095b0,0x14977,
0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,0x09570,0x052f2,0x04970,
0x06566,0x0d4a0,0x0ea50,0x06e95,0x05ad0,0x02b60,0x186e3,0x092e0,0x1c8d7,0x0c950,
0x0d4a0,0x1d8a6,0x0b550,0x056a0,0x1a5b4,0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,
0x06ca0,0x0b550,0x15355,0x04da0,0x0a5d0,0x14573,0x052d0,0x0a9a8,0x0e950,0x06aa0,
0x0aea6,0x0ab50,0x04b60,0x0aae4,0x0a570,0x05260,0x0f263,0x0d950,0x05b57,0x056a0,
0x096d0,0x04dd5,0x04ad0,0x0a4d0,0x0d4d4,0x0d250,0x0d558,0x0b540,0x0b5a0,0x195a6,
0x095b0,0x049b0,0x0a974,0x0a4b0,0x0b27a,0x06a50,0x06d40,0x0af46,0x0ab60,0x09570,
0x04af5,0x04970,0x064b0,0x074a3,0x0ea50,0x06b58,0x055c0,0x0ab60,0x096d5,0x092e0,
0x0c960,0x0d954,0x0d4a0,0x0da50,0x07552,0x056a0,0x0abb7,0x025d0,0x092d0,0x0cab5,
0x0a950,0x0b4a0,0x0baa4,0x0ad50,0x055d9,0x04ba0,0x0a5b0,0x15176,0x052b0,0x0a930,
0x07954,0x06aa0,0x0ad50,0x05b52,0x04b60,0x0a6e6,0x0a4e0,0x0d260,0x0ea65,0x0d530,
0x05aa0,0x076a3,0x096d0,0x04bd7,0x04ad0,0x0a4d0,0x1d0b6,0x0d250,0x0d520,0x0dd45,
0x0b5a0,0x056d0,0x055b2,0x049b0,0x0a577,0x0a4b0,0x0aa50,0x1b255,0x06d20,0x0ada0)var solarMonth=new Array(31,28,31,30,31,30,31,31,30,31,30,31);
var Gan=new Array("甲","乙","丙","丁","戊","己","庚","辛","壬","癸");
var Zhi=new Array("子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥");
var Animals=new Array("鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪");
var solarTerm = new Array("小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨","立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑","白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至")
var sTermInfo = new Array(0,21208,42467,63836,85337,107014,128867,150921,173149,195551,218072,240693,263343,285989,308563,331033,353350,375494,397447,419210,440795,462224,483532,504758)
var nStr1 = new Array('日','一','二','三','四','五','六','七','八','九','十')
var nStr2 = new Array('初','十','廿','卅','　')
var monthName = new Array("1 月","2 月","3 月","4 月","5 月","6 月","7 月","8 月","9 月","10 月","11 月","12 月");//============= 传回农历 y年的总天数
function lYearDays(y) {
   var i, sum = 348
   for(i=0x8000; i>0x8; i>>=1) sum += (lunarInfo[y-1900] & i)? 1: 0
   return(sum+leapDays(y))
}//============= 传回农历 y年闰月的天数
function leapDays(y) {
   if(leapMonth(y))  return((lunarInfo[y-1900] & 0x10000)? 30: 29)
   else return(0)
}//============== 传回农历 y年闰哪个月 1-12 , 没闰传回 0
function leapMonth(y) {
   return(lunarInfo[y-1900] & 0xf)
}//============= 传回农历 y年m月的总天数
function monthDays(y,m) {
   return( (lunarInfo[y-1900] & (0x10000>>m))? 30: 29 )
}//=== 算出农历
function Lunar(objDate) {   var i, leap=0, temp=0
   var baseDate = new Date(1900,0,31)
   var offset   = (objDate - baseDate)/86400000   this.dayCyl = offset + 40
   this.monCyl = 14   for(i=1900; i<2050 && offset>0; i++) {
      temp = lYearDays(i)
      offset -= temp
      this.monCyl += 12
   }   if(offset<0) {
      offset += temp;
      i--;
      this.monCyl -= 12
   }   this.year = i
   this.yearCyl = i-1864   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(this.isLeap == false) this.monCyl ++
   }   if(offset==0 && leap>0 && i==leap+1)
      if(this.isLeap)
         { this.isLeap = false; }
      else
         { this.isLeap = true; --i; --this.monCyl;}   if(offset<0){ offset += temp; --i; --this.monCyl; }   this.month = i
   this.day = offset + 1
}

Answer 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;
      this.sMonth     = sMonth;
      this.sDay       = sDay;
      this.week       = week;
      //农历
      this.lYear      = lYear;
      this.lMonth     = lMonth;
      this.lDay       = lDay;
      this.isLeap     = isLeap;
      //干支
      this.cYear      = cYear;
      this.cMonth     = cMonth;
      this.cDay       = cDay;      this.color      = '';      this.lunarFestival = ''; //农历节日
      this.solarFestival = ''; //国历节日
      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)
function calendar(y,m) {   var sDObj, lDObj, lY, lM, lD=1, lL, lX=0, tmp1, tmp2
   var lDPOS = new Array(3)
   var n = 0
   var firstLM = 0   sDObj = new Date(y,m,1)            //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   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) //农历当月最後一天         if(n==0) firstLM = lM
         lDPOS[n++] = i-lD+1
      }      //sYear,sMonth,sDay,week,
      //lYear,lMonth,lDay,isLeap,
      //cYear,cMonth,cDay
      this[i] = new calElement(y, m+1, i+1, nStr1[(i+this.firstWeek)%7],
                               lY, lM, lD++, lL,
                               cyclical(lDObj.yearCyl) ,cyclical(lDObj.monCyl), cyclical(lDObj.dayCyl++) )      if((i+this.firstWeek)%7==0)   this[i].color = 'red'  //周日颜色
      if((i+this.firstWeek)%14==13) this[i].color = 'red'  //周休二日颜色
   }   //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].solarFestival += 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)
            this[((this.firstWeek>tmp2)?7:0) + 7*(tmp1-1) + tmp2 - this.firstWeek].solarFestival += 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].lunarFestival += RegExp.$4 + ' '
               if(RegExp.$3=='*') this[tmp2].color = 'red'
            }
         }
      }   //黑色星期五
   if((this.firstWeek+12)%7==5)
      this[12].solarFestival += '黑色星期五 '   //今日
   if(y==tY && m==tM) this[tD-1].isToday = true;}//========== 中文日期
function cDay(d){
   var s;
   switch (d) {
      case 10:
         s = '初十'; break;
      case 20:
         s = '二十'; break;
         break;
      case 30:
         s = '三十'; break;
         break;
      default :
         s = nStr2[Math.floor(d/10)];
         s += nStr1[d%10];
   }
   return(s);
}

Answer 2

var cld;function drawCld(SY,SM) {
   var i,sD,s,size;
   cld = new calendar(SY,SM);
   if(SY>1949) yDisplay = '共和国' + (((SY-1949)==1)?'元':SY-1949)
   GZ.innerHTML = yDisplay +'年 农历' + cyclical(SY-1900+36) + '年 &nbsp;&nbsp;【'+Animals[(SY-4)%12]+'】';   YMBG.innerHTML = "&nbsp;" + SY + "<BR>&nbsp;" + monthName[SM];
   for(i=0;i<42;i++) {      sObj=eval('SD'+ i);
      lObj=eval('LD'+ i);      sObj.className = '';      sD = i - cld.firstWeek;      if(sD>-1 && sD<cld.length) { //日期内
         sObj.innerHTML = sD+1;         if(cld[sD].isToday) sObj.className = 'todyaColor'; //今日颜色         sObj.style.color = cld[sD].color; //国定假日颜色         if(cld[sD].lDay==1) //显示农历月
            lObj.innerHTML = '<b>'+(cld[sD].isLeap?'闰':'') + cld[sD].lMonth + '月' + (monthDays(cld[sD].lYear,cld[sD].lMonth)==29?'小':'大')+'</b>';
         else //显示农历日
            lObj.innerHTML = cDay(cld[sD].lDay);         s=cld[sD].lunarFestival;
         if(s.length>0) { //农历节日
            if(s.length>6) s = s.substr(0, 4)+'…';
            s = s.fontcolor('red');
         }
         else { //国历节日
            s=cld[sD].solarFestival;
            if(s.length>0) {
               size = (s.charCodeAt(0)>0 && s.charCodeAt(0)<128)?8:4;
               if(s.length>size+2) s = s.substr(0, size)+'…';
               s = s.fontcolor('blue');
            }
            else { //廿四节气
               s=cld[sD].solarTerms;
               if(s.length>0) s = s.fontcolor('limegreen');
            }
         }
         if(s.length>0) lObj.innerHTML = s;      }
      else { //非日期
         sObj.innerHTML = '';
         lObj.innerHTML = '';
      }
   }
}
function changeCld() {
   var y,m;
   y=CLD.SY.selectedIndex+1900;
   m=CLD.SM.selectedIndex;
   drawCld(y,m);
}function pushBtm(K) {
   switch (K){
      case 'YU' :
         if(CLD.SY.selectedIndex>0) CLD.SY.selectedIndex--;
         break;
      case 'YD' :
         if(CLD.SY.selectedIndex<149) CLD.SY.selectedIndex++;
         break;
      case 'MU' :
         if(CLD.SM.selectedIndex>0) {
            CLD.SM.selectedIndex--;
         }
         else {
            CLD.SM.selectedIndex=11;
            if(CLD.SY.selectedIndex>0) CLD.SY.selectedIndex--;
         }
         break;
      case 'MD' :
         if(CLD.SM.selectedIndex<11) {
            CLD.SM.selectedIndex++;
         }
         else {
            CLD.SM.selectedIndex=0;
            if(CLD.SY.selectedIndex<149) CLD.SY.selectedIndex++;
         }
         break;
      default :
         CLD.SY.selectedIndex=tY-1900;
         CLD.SM.selectedIndex=tM;
   }
   changeCld();
}
var Today = new Date();
var tY = Today.getFullYear();
var tM = Today.getMonth();
var tD = Today.getDate();
////////////////////var width = "130";
var offsetx = 2;
var offsety = 16;var x = 0;
var y = 0;
var snow = 0;
var sw = 0;
var cnt = 0;var dStyle;
document.onmousemove = mEvn;//显示详细日期资料
function mOvr(v) {
   var s,festival;
   var sObj=eval('SD'+ v);
   var d=sObj.innerHTML-1;      //sYear,sMonth,sDay,week,
      //lYear,lMonth,lDay,isLeap,
      //cYear,cMonth,cDay   if(sObj.innerHTML!='') {      sObj.style.cursor = 's-resize';      if(cld[d].solarTerms == '' && cld[d].solarFestival == '' && cld[d].lunarFestival == '')
         festival = '';
      else
         festival = '<TABLE WIDTH=100% BORDER=0 CELLPADDING=2 CELLSPACING=0 BGCOLOR="#CCFFCC"><TR><TD>'+
         '<FONT COLOR="#000000" STYLE="font-size:9pt;">'+cld[d].solarTerms + ' ' + cld[d].solarFestival + ' ' + cld[d].lunarFestival+'</FONT></TD>'+
         '</TR></TABLE>';      s= '<TABLE WIDTH="130" BORDER=0 CELLPADDING="2" CELLSPACING=0 BGCOLOR="#000066"><TR><TD>' +
         '<TABLE WIDTH=100% BORDER=0 CELLPADDING=0 CELLSPACING=0><TR><TD ALIGN="right"><FONT COLOR="#ffffff" STYLE="font-size:9pt;">'+
         cld[d].sYear+' 年 '+cld[d].sMonth+' 月 '+cld[d].sDay+' 日<br>星期'+cld[d].week+'<br>'+
         '<font color="violet">农历'+(cld[d].isLeap?'闰 ':' ')+cld[d].lMonth+' 月 '+cld[d].lDay+' 日</font><br>'+
         '<font color="yellow">'+cld[d].cYear+'年 '+cld[d].cMonth+'月 '+cld[d].cDay + '日</font>'+
         '</FONT></TD></TR></TABLE>'+ festival +'</TD></TR></TABLE>';
      document.all["detail"].innerHTML = s;    if (snow == 0) {
         dStyle.left = x+offsetx-(width/2);
         dStyle.top = y+offsety;
    dStyle.visibility = "visible";
    snow = 1;
    }
}
}//清除详细日期资料
function mOut() {
if ( cnt >= 1 ) { sw = 0 }
if ( sw == 0 ) { snow = 0; dStyle.visibility = "hidden";}
else cnt++;
}//取得位置
function mEvn() {
   x=event.x;
   y=event.y;
if (document.body.scrollLeft)
   {x=event.x+document.body.scrollLeft; y=event.y+document.body.scrollTop;}
if (snow){
      dStyle.left = x+offsetx-(width/2)
      dStyle.top = y+offsety
}
}////////////function changeTZ() {
   CITY.innerHTML = CLD.TZ.value.substr(6)
   setCookie("TZ",CLD.TZ.selectedIndex)
}function tick() {
   var today
   today = new Date()
   Clock.innerHTML = today.toLocaleString().replace(/(年|月)/g, "/").replace(/日/, "");
   Clock.innerHTML = TimeAdd(today.toGMTString(), CLD.TZ.value)
   window.setTimeout("tick()", 1000);
}function setCookie(name, value) {
var today = new Date()
var expires = new Date()
expires.setTime(today.getTime() + 1000*60*60*24*365)
document.cookie = name + "=" + escape(value) + "; expires=" + expires.toGMTString()
}function getCookie(Name) {
   var search = Name + "="
   if(document.cookie.length > 0) {
      offset = document.cookie.indexOf(search)
      if(offset != -1) {
         offset += search.length
         end = document.cookie.indexOf(";", offset)
         if(end == -1) end = document.cookie.length
         return unescape(document.cookie.substring(offset, end))
      }
      else return ""
   }
}/////////////////////////////////////////////////////////function initial() {
   dStyle = detail.style;
   CLD.SY.selectedIndex=tY-1900;
   CLD.SM.selectedIndex=tM;
   drawCld(tY,tM);   CLD.TZ.selectedIndex=getCookie("TZ");
   changeTZ();
   tick();
}//-->
</SCRIPT><SCRIPT language=VBScript>
<!--
'===== 算世界时间
Function TimeAdd(UTC,T)
   Dim PlusMinus, DST, y
   If Left(T,1)="-" Then PlusMinus = -1 Else PlusMinus = 1
   UTC=Right(UTC,Len(UTC)-5)
   UTC=Left(UTC,Len(UTC)-4)
   y = Year(UTC)
   TimeAdd=DateAdd("n", (Cint(Mid(T,2,2))*60 + Cint(Mid(T,4,2))) * PlusMinus, UTC)
   '美国日光节约期间: 4月第一个星日00:00 至 10月最後一个星期日00:00
   If Mid(T,6,1)="*" And DateSerial(y,4,(9 - Weekday(DateSerial(y,4,1)) mod 7) ) <= TimeAdd And DateSerial(y,10,31 - Weekday(DateSerial(y,10,31))) >= TimeAdd Then
      TimeAdd=CStr(DateAdd("h", 1, TimeAdd))
      tSave.innerHTML = "R"
   Else
      tSave.innerHTML = ""
   End If
   TimeAdd = CStr(TimeAdd)
End Function
'-->
</SCRIPT>