주민번호 타당성 검사
<body>
<form id='myform' method='post' action='member_join.jsp'>
<table border=0 align='center'>
<tr>
<td>주민번호</td>
<td>
<input type='text' id='jumin1' size=6 maxlength=6 onkeyup='move()'> -
<input type='text' id='jumin2' size=7 maxlength=7>
<input type='button' value="검사" onclick='checkInput()'>
<input type='reset' value="취소">
</td>
</tr>
</table>
</form>
<script>
var myform = document.getElementById("myform");
var jumin1 = document.getElementById("jumin1");
var jumin2 = document.getElementById("jumin2");
function move(){
if(jumin1.value.length == 6){
jumin2.focus();
}
}
function checkInput() {
if(jumin1.value=='') {
alert("주민등록번호를 앞자리를 입력하세요!");
jumin1.focus();
return;
}
if(jumin1.value.length != 6) {
alert("주민등록번호의 앞자릿수가 맞지 않습니다.");
jumin1.value = '';
jumin1.focus();
return;
}
if(jumin2.value=='') {
alert("주민등록번호를 뒷자리를 입력하세요!");
jumin2.focus();
return;
}
if(jumin2.value.length != 7) {
alert("주민등록번호의 뒷자릿수가 맞지 않습니다.");
jumin2.focus();
jumin2.value = '';
return;
}
if(!juminCheck(jumin1.value + jumin2.value)) {
alert("주민등록번호가 잘못되었습니다.");
jumin1.focus();
return;
}
alert("올바른 주민번호 입니다.");
}
function juminCheck(jumin) {
// jumin = "9501011234567";
var total = 0;
var total2;
// total += parseInt(jumin.substr(0,1)) * 2;
// total += parseInt(jumin.substr(1,1)) * 3;
// total += parseInt(jumin.substr(2,1)) * 4;
// total += parseInt(jumin.substr(3,1)) * 5;
// total += parseInt(jumin.substr(4,1)) * 6;
// total += parseInt(jumin.substr(5,1)) * 7;
// total += parseInt(jumin.substr(6,1)) * 8;
// total += parseInt(jumin.substr(7,1)) * 9;
// total += parseInt(jumin.substr(8,1)) * 2;
// total += parseInt(jumin.substr(9,1)) * 3;
// total += parseInt(jumin.substr(10,1)) * 4;
// total += parseInt(jumin.substr(11,1)) * 5;
mul = [ 2, 3, 4, 5, 6, 7, 8, 9, 2, 3, 4, 5 ];
for (var i = 0; i <= 11; i++) {
total += parseInt(jumin.substr(i, 1)) * mul[i];
}
total %= 11; // total = total % 11;
total2 = 11 - total;
if(total2 > 9)
total2 = total2 % 10;
if(total2 != parseInt(jumin.substr(12,1))) { // 체크용 번호와 비교
return false;
}else{
return true;
}
}
</script>
개발 어린이