// 주민번호 체크 - arguments[0] : 주민번호 구분자
String.prototype.isJumin = function() {
	var arg = arguments[0] ? arguments[0] : "";
	var jumin = eval("this.match(/[0-9]{2}[01]{1}[0-9]{1}[0123]{1}[0-9]{1}" + arg + "[1234]{1}[0-9]{6}$/)");

	if(jumin == null) {
		return false;
	}
	else {
		jumin = jumin.toString();
	}

	// 생년월일 체크
	var birthYY = (parseInt(jumin.charAt(6)) == (1 ||2)) ? "19" : "20";
	birthYY += jumin.substr(0, 2);
	var birthMM = jumin.substr(2, 2) - 1;
	var birthDD = jumin.substr(4, 2);
	var birthDay = new Date(birthYY, birthMM, birthDD);

	if(birthDay.getYear() % 100 != jumin.substr(0,2) || birthDay.getMonth() != birthMM || birthDay.getDate() != birthDD) {
		return false;
	}        

	var sum = 0;
	var num = [2, 3, 4, 5, 6, 7, 8, 9, 2, 3, 4, 5];
	var last = parseInt(jumin.charAt(12));

	for(var i = 0; i < 12; i++) {
		sum += parseInt(jumin.charAt(i)) * num[i];
	}

	return ((11 - sum % 11) % 10 == last) ? true : false;
}


// 외국인 등록번호 체크 - arguments[0] : 등록번호 구분자
String.prototype.isForeign = function() {
	var arg = arguments[0] ? arguments[0] : "";
	var jumin = eval("this.match(/[0-9]{2}[01]{1}[0-9]{1}[0123]{1}[0-9]{1}" + arg + "[5678]{1}[0-9]{1}[02468]{1}[0-9]{2}[6789]{1}[0-9]{1}$/)");

	if(jumin == null) {
		return false;
	}
	else {
		jumin = jumin.toString().num().toString();
	}

	// 생년월일 체크
	var birthYY = (parseInt(jumin.charAt(6)) == (5 || 6)) ? "19" : "20";
	birthYY += jumin.substr(0, 2);
	var birthMM = jumin.substr(2, 2) - 1;
	var birthDD = jumin.substr(4, 2);
	var birthDay = new Date(birthYY, birthMM, birthDD);

	if(birthDay.getYear() % 100 != jumin.substr(0,2) || birthDay.getMonth() != birthMM || birthDay.getDate() != birthDD) {
		return false;
	}

	if((parseInt(jumin.charAt(7)) * 10 + parseInt(jumin.charAt(8))) % 2 != 0) {
		return false;
	}

	var sum = 0;
	var num = [2, 3, 4, 5, 6, 7, 8, 9, 2, 3, 4, 5];
	var last = parseInt(jumin.charAt(12));

	for(var i = 0; i < 12; i++) {
		sum += parseInt(jumin.charAt(i)) * num[i];
	}

	return (((11 - sum % 11) % 10) + 2 == last) ? true : false;
}    

// 사업자번호 체크 - arguments[0] : 등록번호 구분자
String.prototype.isBiznum = function() {
	var arg = arguments[0] ? arguments[0] : "";
	var biznum = eval("this.match(/[0-9]{3}" + arg + "[0-9]{2}" + arg + "[0-9]{5}$/)");

	if(biznum == null) {
		return false;
	}
	else {
		biznum = biznum.toString().num().toString();
	}

	var sum = parseInt(biznum.charAt(0));
	var num = [0, 3, 7, 1, 3, 7, 1, 3];

	for(var i = 1; i < 8; i++) sum += (parseInt(biznum.charAt(i)) * num[i]) % 10;
	
	sum += Math.floor(parseInt(parseInt(biznum.charAt(8))) * 5 / 10);
	sum += (parseInt(biznum.charAt(8)) * 5) % 10 + parseInt(biznum.charAt(9));

	return (sum % 10 == 0) ? true : false;
}

// 법인 등록번호 체크 - arguments[0] : 등록번호 구분자
String.prototype.isCorpnum = function() {
	var arg = arguments[0] ? arguments[0] : "";
	var corpnum = eval("this.match(/[0-9]{6}" + arg + "[0-9]{7}$/)");

	if(corpnum == null) {
		return false;
	}
	else {
		corpnum = corpnum.toString().num().toString();
	}

	var sum = 0;
	var num = [1, 2, 1, 2, 1, 2, 1, 2, 1, 2, 1, 2];
	var last = parseInt(corpnum.charAt(12));

	for(var i = 0; i < 12; i++) {
		sum += parseInt(corpnum.charAt(i)) * num[i];
	}

	return ((10 - sum % 10) % 10 == last) ? true : false;
}