function showdate() { 
week= new Array("يكشنبه","دوشنبه","سه شنبه","چهارشنبه","پنج شنبه","جمعه","شنبه") 
months = new Array("فروردين","ارديبهشت","خرداد","تير","مرداد","شهريور","مهر","آبان","آذر","دي","بهمن","اسفند"); 
a = new Date(); 
d= a.getDay(); 
day= a.getDate(); 
month = a.getMonth()+1; 
year= a.getYear(); 

year = (year== 0)?2000:year; 
(year<1000)? (year += 2000):true; 
year -= ( (month < 3) || ((month == 3) && (day < 21)) )? 722:621; 
switch (month) { 
case 1: (day<21)? (month=10, day+=10):(month=11, day-=20); break; 
case 2: (day<20)? (month=11, day+=11):(month=12, day-=19); break; 
case 3: (day<21)? (month=12, day+=9):(month=1, day-=20); break; 
case 4: (day<21)? (month=1, day+=11):(month=2, day-=20); break; 
case 5: 
case 6: (day<22)? (month-=3, day+=10):(month-=2, day-=21); break; 
case 7: 
case 8: 
case 9: (day<23)? (month-=3, day+=9):(month-=2, day-=22); break; 
case 10:(day<23)? (month=7, day+=8):(month=8, day-=22); break; 
case 11: 
case 12:(day<22)? (month-=3, day+=9):(month-=2, day-=21); break; 
default: break; 
} 
document.write(" "+week[d]+" "+day+" "+months[month-1]+" "+ year); 
}