g_days_in_month = new Array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
j_days_in_month = new Array(31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29);
g_months = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
j_months = new Array("فروردين","ارديبهشت","خرداد","تير","مرداد","شهريور","مهر","آبان","آذر","دي","بهمن","اسفند");
g_days = new Array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday");
j_days = new Array("شنبه","يكشنبه","دوشنبه","سه شنبه","چهارشنبه","پنجشنبه","جمعه");
function div(a,b)
{
return Math.floor(a/b);
}
function gregorian_to_jalali(g)
{
var gy, gm, gd;
var jy, jm, jd;
var g_day_no, j_day_no;
var j_np;
var i;
gy = g[0]-1600;
gm = g[1]-1;
gd = g[2]-1;
g_day_no = 365*gy+div((gy+3),4)-div((gy+99),100)+div((gy+399),400);
for (i=0;i<gm;++i)
g_day_no += g_days_in_month[i];
if (gm>1 && ((gy%4==0 && gy%100!=0) || (gy%400==0)))
++g_day_no;
g_day_no += gd;
j_day_no = g_day_no-79;
j_np = div(j_day_no, 12053);
j_day_no %= 12053;
jy = 979+33*j_np+4*div(j_day_no,1461);
j_day_no %= 1461;
if (j_day_no >= 366)
{
jy += div((j_day_no-1),365);
j_day_no = (j_day_no-1)%365;
}
for (i = 0; i < 11 && j_day_no >= j_days_in_month[i]; ++i)
{
j_day_no -= j_days_in_month[i];
}
jm = i+1;
jd = j_day_no+1;
return new Array(jy, jm, jd);
}
function jalali_to_gregorian(j)
{
var gy, gm, gd;
var jy, jm, jd;
var g_day_no, j_day_no;
var leap;
var i;
jy = j[0]-979;
jm = j[1]-1;
jd = j[2]-1;
j_day_no = 365*jy + div(jy,33)*8 + div((jy%33+3),4);
for (i=0; i < jm; ++i)
j_day_no += j_days_in_month[i];
j_day_no += jd;
g_day_no = j_day_no+79;
gy = 1600 + 400*div(g_day_no,146097);
g_day_no = g_day_no % 146097;
leap = 1;
if (g_day_no >= 36525)
{
g_day_no--;
gy += 100*div(g_day_no,36524);
g_day_no = g_day_no % 36524;
if (g_day_no >= 365)
g_day_no++;
else
leap = 0;
}
gy += 4*div(g_day_no,1461);
g_day_no %= 1461;
if (g_day_no >= 366) {
leap = 0;
g_day_no--;
gy += div(g_day_no, 365);
g_day_no = g_day_no % 365;
}
for (i = 0; g_day_no >= g_days_in_month[i] + (i == 1 && leap); i++)
g_day_no -= g_days_in_month[i] + (i == 1 && leap);
gm = i+1;
gd = g_day_no+1;
return new Array(gy, gm, gd);
}
function S_J_G(a)
{
b = jalali_to_gregorian(a);
return b[2] + " " + g_months[b[1]] + " " + b[0];
}
function S_G_J(a)
{
b = gregorian_to_jalali(a);
return b[2] + " " + j_months[b[1]-1] + " " + b[0];
}
function STD_J() {
Today = new Date();
j = S_G_J(new Array(Today.getFullYear(),Today.getMonth()+1,Today.getDate()));
return j;
}
function STD_G() {
Today = new Date();
j = new Array(Today.getFullYear(),Today.getMonth(),Today.getDate());
return j[2] + " " + g_months[j[1]] + " " + j[0];
}
function jalali_today() {
Today = new Date();
j = gregorian_to_jalali(new Array(Today.getFullYear(),Today.getMonth()+1,Today.getDate()));
return j[2]+"/"+j[1]+"/"+j[0];
}