JavaScript comprehensively displays lunar calendar (lunar calendar) and solar calendar
Author：Eve Cole
Update Time：2009-06-11 16:32:55
<script type="text/javascript">var now=new Date();</script>
<script language=javascript>
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);
//==== 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, 传入日期物件, 传回农历日期物件
// 该物件属性有 .year .month .day .isleap .yearcyl .daycyl .moncyl
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
}
function cday(m,d){
var nstr1 = new Array('日','一','二','三','四','五','六','七','八','九','十');
var nstr2 = new Array('初','十','廿','卅',' ');
var s;
if (m>10){s = '十'+nstr1[m-10]} else {s = nstr1[m]} s += '月'
if (s=="十二月") s = "腊月";
if (s=="一月") s = "正月";
switch (d) {
case 10:s += '初十'; break;
case 20:s += '二十'; break;
case 30:s += '三十'; break;
default:s += nstr2[Math.floor(d/10)]; s += nstr1[d%10];
}
return(s);
}
function solarday2(){
var sdobj = new Date(now.getFullYear(),now.getMonth(),now.getDate());
var ldobj = new lunar(sdobj);
var cl = '';
//农历bb'+(cld[d].isleap?'闰 ':' ')+cld[d].lmonth+' 月 '+cld[d].lday+' 日
var tt = cday(ldobj.month,ldobj.day);
document.write(now.getFullYear()+"年"+(now.getMonth()+1)+"月"+now.getDate()+"日 农历"+tt+"");
}
solarday2();
</script>
