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,
0x14b63);

var solarMonth=new Array(31,28,31,30,31,30,31,31,30,31,30,31);
var Gan=new Array();
var Zhi=new Array();
var Animals=new Array();
var solarTerm = new Array("小寒","大寒","立春","雨水","驚蟄","春分","清明","穀雨","立夏","小滿","芒種","夏至","小暑","大暑","立秋","處暑","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();
var nStr2 = new Array();
var monthName = new Array("JAN","FEB","MAR","APR","MAY","JUN","JUL","AUG","SEP","OCT","NOV","DEC");


/*****************************************************************************
                                      日期計算
*****************************************************************************/

//====================================== 傳回農曆 y年的總天數
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));
}

//====================================== 傳回農曆 y年閏月的天數
function leapDays(y) {
   if(leapMonth(y))  return((lunarInfo[y-1900] & 0x10000)? 30: 29);
   else return(0);
}

//====================================== 傳回農曆 y年閏哪個月 1-12 , 沒閏傳回 0
function leapMonth(y) {
   return(lunarInfo[y-1900] & 0xf);
}

//====================================== 傳回農曆 y年m月的總天數
function monthDays(y,m) {
   return( (lunarInfo[y-1900] & (0x10000>>m))? 30: 29 );
}

//====================================== 算出農曆, 傳入日期物件, 傳回農曆日期物件
//                                       該物件屬性有 .year .month .day .isLeap .yearCyl .dayCyl .monCyl
function Lunar(objDate) {

   var i, leap=0, temp=0;
   var offset   = (Date.UTC(objDate.getFullYear(),objDate.getMonth(),objDate.getDate()) - Date.UTC(1900,0,31))/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); //閏哪個月
   this.isLeap = false;

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

      //解除閏月
      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;
}

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

//============================== 月曆屬性
function calElement(sYear,sMonth,sDay,week,lYear,lMonth,lDay,isLeap,cYear,cMonth,cDay) {

      this.isToday    = false;
      //國曆
      this.sYear      = sYear;
      this.sMonth     = sMonth;
      this.sDay       = sDay;
      this.week       = week;
      //農曆
      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 = ''; //農曆節日
      this.solarFestival = ''; //國曆節日
      this.solarTerms    = ''; //節氣

}

//===== 某年的第n個節氣為幾日(從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());
}

//============================== 傳回月曆物件 (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,1,0,0,0,0);    //當月一日日期

   this.length    = solarDays(y,m);    //國曆當月天數
   this.firstWeek = sDObj.getDay();    //國曆當月1日星期幾


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

      if(lD>lX) {
         sDObj = new Date(y,m,i+1);    //當月一日日期
         lDObj = new Lunar(sDObj);     //農曆
         lY    = lDObj.year;           //農曆年
         lM    = lDObj.month;          //農曆月
         lD    = lDObj.day;            //農曆日
         lL    = lDObj.isLeap;         //農曆是否閏月
         lX    = lL? leapDays(lY): monthDays(lY,lM); //農曆當月最後一天

         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++) );


   }


   //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);
}

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

var cld;

function drawCld(SY,SM) {
   var i,sD,s,size;
   cld = new calendar(SY,SM);

   if(SY>1874 && SY<1909) yDisplay = '光緒' + (((SY-1874)==1)?'元':SY-1874);
   if(SY>1908 && SY<1912) yDisplay = '宣統' + (((SY-1908)==1)?'元':SY-1908);
   if(SY>1911) yDisplay = '民國' + (((SY-1911)==1)?'元':SY-1911);


   YMBG.innerHTML = "&nbsp;" + SY + "<BR>&nbsp;" + monthName[SM];//背景字


   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) { //日期內
         sObj.innerHTML = sD+1;

         if(cld[sD].isToday) sObj.className = 'todyaColor'; //今日顏色

         s=cld[sD].lunarFestival;
         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<150) 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<150) 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();
//////////////////////////////////////////////////////////////////////////////


function initialize() {
   dStyle = detail.style;
   CLD.SY.selectedIndex=tY-1900;
   CLD.SM.selectedIndex=tM;
   drawCld(tY,tM);
   /*CLD.TZ.selectedIndex=getCookie("TZ");*/
   //changeTZ();
   tick();
}

//function terminate(){
  // setCookie("TZ",CLD.TZ.selectedIndex);
//}

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 changeTZ() {
   CITY.innerHTML = CLD.TZ.value.substr(6);
   var pos = Math.floor(CLD.TZ.value.substr(0,3));
   if(pos<0) pos+=24;
   pos*=-10;
   world.style.left = pos;
}
*/
function tick() {
   var today;
   today = new Date();
   //Clock.innerHTML = today.toLocaleString();
   //Clock2.innerHTML = TimeAdd(today.toGMTString(), CLD.TZ.value);
   window.setTimeout("tick()", 1000);
}