function showdate() {
    week= new Array("يكشنبه","دوشنبه","سه شنبه","چهارشنبه","پنج‌شنبه","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)) )? 622:621;
	year = year % 100;
	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]+'              13'+ year);
}