JalaliDate = { g_days_in_month: [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31], j_days_in_month: [31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29]
}; JalaliDate.jalaliToGregorian = function(j_y, j_m, j_d)
{ j_y = parseInt(j_y); j_m = parseInt(j_m); j_d = parseInt(j_d); var jy = j_y-979; var jm = j_m-1; var jd = j_d-1; var j_day_no = 365*jy + parseInt(jy / 33)*8 + parseInt((jy%33+3) / 4); for (var i=0; i < jm; ++i) j_day_no += JalaliDate.j_days_in_month[i]; j_day_no += jd; var g_day_no = j_day_no+79; var gy = 1600 + 400 * parseInt(g_day_no / 146097); g_day_no = g_day_no % 146097; var leap = true; if (g_day_no >= 36525)
{ g_day_no--; gy += 100*parseInt(g_day_no/ 36524); g_day_no = g_day_no % 36524; if (g_day_no >= 365)
g_day_no++; else
leap = false;}
gy += 4*parseInt(g_day_no/ 1461); g_day_no %= 1461; if (g_day_no >= 366) { leap = false; g_day_no--; gy += parseInt(g_day_no/ 365); g_day_no = g_day_no % 365;}
for (var i = 0; g_day_no >= JalaliDate.g_days_in_month[i] + (i == 1 && leap); i++)
g_day_no -= JalaliDate.g_days_in_month[i] + (i == 1 && leap); var gm = i+1; var gd = g_day_no+1; return [gy, gm, gd];}
JalaliDate.checkDate = function(j_y, j_m, j_d)
{ return !(j_y < 0 || j_y > 32767 || j_m < 1 || j_m > 12 || j_d < 1 || j_d >
(JalaliDate.j_days_in_month[j_m-1] + (j_m == 12 && !((j_y-979)%33%4))));}
JalaliDate.gregorianToJalali = function(g_y, g_m, g_d)
{ g_y = parseInt(g_y); g_m = parseInt(g_m); g_d = parseInt(g_d); var gy = g_y-1600; var gm = g_m-1; var gd = g_d-1; var g_day_no = 365*gy+parseInt((gy+3) / 4)-parseInt((gy+99)/100)+parseInt((gy+399)/400); for (var i=0; i < gm; ++i)
g_day_no += JalaliDate.g_days_in_month[i]; if (gm>1 && ((gy%4==0 && gy%100!=0) || (gy%400==0))) ++g_day_no; g_day_no += gd; var j_day_no = g_day_no-79; var j_np = parseInt(j_day_no/ 12053); j_day_no %= 12053; var jy = 979+33*j_np+4*parseInt(j_day_no/1461); j_day_no %= 1461; if (j_day_no >= 366) { jy += parseInt((j_day_no-1)/ 365); j_day_no = (j_day_no-1)%365;}
for (var i = 0; i < 11 && j_day_no >= JalaliDate.j_days_in_month[i]; ++i) { j_day_no -= JalaliDate.j_days_in_month[i];}
var jm = i+1; var jd = j_day_no+1; return [jy, jm, jd];}
Date.prototype.setJalaliFullYear = function(y, m, d) { var gd = this.getDate(); var gm = this.getMonth(); var gy = this.getFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); if (y < 100) y += 1300; j[0] = y; if (m != undefined) { if (m > 11) { j[0] += Math.floor(m / 12); m = m % 12;}
j[1] = m + 1;}
if (d != undefined) j[2] = d; var g = JalaliDate.jalaliToGregorian(j[0], j[1], j[2]); return this.setFullYear(g[0], g[1]-1, g[2]);}
Date.prototype.setJalaliMonth = function(m, d) { var gd = this.getDate(); var gm = this.getMonth(); var gy = this.getFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); if (m > 11) { j[0] += math.floor(m / 12); m = m % 12;}
j[1] = m+1; if (d != undefined) j[2] = d; var g = JalaliDate.jalaliToGregorian(j[0], j[1], j[2]); return this.setFullYear(g[0], g[1]-1, g[2]);}
Date.prototype.setJalaliDate = function(d) { var gd = this.getDate(); var gm = this.getMonth(); var gy = this.getFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); j[2] = d; var g = JalaliDate.jalaliToGregorian(j[0], j[1], j[2]); return this.setFullYear(g[0], g[1]-1, g[2]);}
Date.prototype.getJalaliFullYear = function() { var gd = this.getDate(); var gm = this.getMonth(); var gy = this.getFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); return j[0];}
Date.prototype.getJalaliMonth = function() { var gd = this.getDate(); var gm = this.getMonth(); var gy = this.getFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); return j[1]-1;}
Date.prototype.getJalaliDate = function() { var gd = this.getDate(); var gm = this.getMonth(); var gy = this.getFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); return j[2];}
Date.prototype.getJalaliDay = function() { var day = this.getDay(); day = (day + 1) % 7; return day;}
Date.prototype.setJalaliUTCFullYear = function(y, m, d) { var gd = this.getUTCDate(); var gm = this.getUTCMonth(); var gy = this.getUTCFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); if (y < 100) y += 1300; j[0] = y; if (m != undefined) { if (m > 11) { j[0] += Math.floor(m / 12); m = m % 12;}
j[1] = m + 1;}
if (d != undefined) j[2] = d; var g = JalaliDate.jalaliToGregorian(j[0], j[1], j[2]); return this.setUTCFullYear(g[0], g[1]-1, g[2]);}
Date.prototype.setJalaliUTCMonth = function(m, d) { var gd = this.getUTCDate(); var gm = this.getUTCMonth(); var gy = this.getUTCFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); if (m > 11) { j[0] += math.floor(m / 12); m = m % 12;}
j[1] = m+1; if (d != undefined) j[2] = d; var g = JalaliDate.jalaliToGregorian(j[0], j[1], j[2]); return this.setUTCFullYear(g[0], g[1]-1, g[2]);}
Date.prototype.setJalaliUTCDate = function(d) { var gd = this.getUTCDate(); var gm = this.getUTCMonth(); var gy = this.getUTCFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); j[2] = d; var g = JalaliDate.jalaliToGregorian(j[0], j[1], j[2]); return this.setUTCFullYear(g[0], g[1]-1, g[2]);}
Date.prototype.getJalaliUTCFullYear = function() { var gd = this.getUTCDate(); var gm = this.getUTCMonth(); var gy = this.getUTCFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); return j[0];}
Date.prototype.getJalaliUTCMonth = function() { var gd = this.getUTCDate(); var gm = this.getUTCMonth(); var gy = this.getUTCFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); return j[1]-1;}
Date.prototype.getJalaliUTCDate = function() { var gd = this.getUTCDate(); var gm = this.getUTCMonth(); var gy = this.getUTCFullYear(); var j = JalaliDate.gregorianToJalali(gy, gm+1, gd); return j[2];}
Date.prototype.getJalaliUTCDay = function() { var day = this.getUTCDay(); day = (day + 1) % 7; return day;}