/*
Jalali (Shamsi) Calendar Date Picker Version 1.00 (JavaScript)
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Written By : Amin Habibi Shahri
E-mail : habibiamin@gmail.com
Homepage: http://habibiamin.googlepages.com
*/
/*  MOD -- Modulus function which works for non-integers.  */
function mod(a, b)
{
return a-(b * Math.floor(a / b));
}
function jwday(j)
{
return mod(Math.floor((j+1.5)), 7);
}
var Weekdays = new Array( "Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday" );
function leap_gregorian(year)
{
return ((year % 4) == 0) &&
(!(((year % 100) == 0) && ((year % 400) != 0)));
}
var GREGORIAN_EPOCH = 1721425.5;
function gregorian_to_jd(year, month, day)
{
return (GREGORIAN_EPOCH-1)+
(365 * (year-1))+
Math.floor((year-1) / 4)+
(-Math.floor((year-1) / 100))+
Math.floor((year-1) / 400)+
Math.floor((((367 * month)-362) / 12)+
((month <= 2) ? 0 :
(leap_gregorian(year) ?-1 :-2)
)+
day);
}
function jd_to_gregorian(jd) {
var wjd, depoch, quadricent, dqc, cent, dcent, quad, dquad,
yindex, dyindex, year, yearday, leapadj;
wjd = Math.floor(jd-0.5)+0.5;
depoch = wjd-GREGORIAN_EPOCH;
quadricent = Math.floor(depoch / 146097);
dqc = mod(depoch, 146097);
cent = Math.floor(dqc / 36524);
dcent = mod(dqc, 36524);
quad = Math.floor(dcent / 1461);
dquad = mod(dcent, 1461);
yindex = Math.floor(dquad / 365);
year = (quadricent * 400)+(cent * 100)+(quad * 4)+yindex;
if (!((cent == 4) || (yindex == 4))) {
year++;
}
yearday = wjd-gregorian_to_jd(year, 1, 1);
leapadj = ((wjd < gregorian_to_jd(year, 3, 1)) ? 0
:
(leap_gregorian(year) ? 1 : 2)
);
month = Math.floor((((yearday+leapadj) * 12)+373) / 367);
day = (wjd-gregorian_to_jd(year, month, 1))+1;
return new Array(year, month, day);
}
function leap_persian(year)
{
return ((((((year-((year > 0) ? 474 : 473)) % 2820)+474)+38) * 682) % 2816) < 682;
}
var PERSIAN_EPOCH = 1948320.5;
var PERSIAN_WEEKDAYS = new Array("�����", "������",
"�� ����", "��������",
"��� ����", "����", "����");
function persian_to_jd(year, month, day)
{
var epbase, epyear;
epbase = year-((year >= 0) ? 474 : 473);
epyear = 474+mod(epbase, 2820);
return day+
((month <= 7) ?
((month-1) * 31) :
(((month-1) * 30)+6)
)+
Math.floor(((epyear * 682)-110) / 2816)+
(epyear-1) * 365+
Math.floor(epbase / 2820) * 1029983+
(PERSIAN_EPOCH-1);
}
function jd_to_persian(jd)
{
var year, month, day, depoch, cycle, cyear, ycycle,
aux1, aux2, yday;
jd = Math.floor(jd)+0.5;
depoch = jd-persian_to_jd(475, 1, 1);
cycle = Math.floor(depoch / 1029983);
cyear = mod(depoch, 1029983);
if (cyear == 1029982) {
ycycle = 2820;
} else {
aux1 = Math.floor(cyear / 366);
aux2 = mod(cyear, 366);
ycycle = Math.floor(((2134 * aux1)+(2816 * aux2)+2815) / 1028522)+
aux1+1;
}
year = ycycle+(2820 * cycle)+474;
if (year <= 0) {
year--;
}
yday = (jd-persian_to_jd(year, 1, 1))+1;
month = (yday <= 186) ? Math.ceil(yday / 31) : Math.ceil((yday-6) / 30);
day = (jd-persian_to_jd(year, month, 1))+1;
return new Array(year, month, day);
}
function calcPersian(year,month,day)
{
var date,j;
j = persian_to_jd(year,month,day);
date = jd_to_gregorian(j);
weekday = jwday(j);
return new Array(date[0], date[1], date[2],weekday);
}
function calcGregorian(year,month,day)
{
month--;
var j, weekday;
j = gregorian_to_jd(year, month+1, day)+
(Math.floor(0+60 * (0+60 * 0)+0.5) / 86400.0);
perscal = jd_to_persian(j);
weekday = jwday(j);
return new Array(perscal[0], perscal[1], perscal[2],weekday);
}
function getTodayGregorian()
{
var t = new Date();
var today = new Date();
var y = today.getYear();
if (y < 1000) {
y+= 1900;
}
return new Array(y, today.getMonth()+1, today.getDate(),t.getDay());
}
function getTodayPersian()
{
var t = new Date();
var today = getTodayGregorian();
var persian = calcGregorian(today[0],today[1],today[2]);
return new Array(persian[0],persian[1],persian[2],t.getDay());
}