function check_rrn(obj, rrn1, rrn2){
		var rrn = rrn1 + rrn2;
		var result = 0;

		for(var i=0; i<12; i++)
			result = result + ((i % 8) + 2) * rrn.substring(i, i+1);
		result = (11 - (result % 11)) % 10;

		if(rrn.length < 12 || result != rrn.substring(12, 13)){
			alert('¿Ã¹Ù¸¥ Áֹεî·Ï¹øÈ£¸¦ ÀÔ·ÂÇϼ¼¿ä');
			obj.focus();
			return false;
		}
		return true;
	}