| Philip M |
10-24-2012 10:13 AM |
Canadian Social Insurance Number SIN Validator
Code:
<!DOCTYPE >
<html>
<head>
<title>Canadian Social Insurance Number Validation</title>
</head>
<script type="text/javascript">
// valid number examples 046-454-286 193-456-787 127-248-623
var sin = 0;
function validate(which,next) {
var val = which.value;
val = val.replace(/[^0-9]/g,"")
which.value = val;
next = "S" + next;
if (val.length == 3) {
document.getElementById(next).focus();
}
sin = document.getElementById("S1").value + document.getElementById("S2").value + document.getElementById("S3").value;
}
function CheckNumber(sin) { // sin is a string value
var c = 0;
if (sin.substring(0,3) == "000") {
alert("Invalid SIN: SIN's can't start with 000.");
document.getElementById("S1").value = ""; // clear the fields
document.getElementById("S2").value = "";
document.getElementById("S3").value = "";
//document.getElementById("S1").focus(); // if required
return false;
}
if (sin.length !=9) {
alert ("You must complete all three fields!");
return false;
}
// odd digits
for (var i = 1; i<=9; i+=2) {
c += Number(sin.charAt(i-1));
}
// even digits
for (var i = 2; i <=8; i+=2) {
var digit = Number(sin.charAt(i-1)) *2;
if (digit >9) {digit = digit -9}
c += digit;
}
sin = document.getElementById("S1").value + "-" + document.getElementById("S2").value + "-" +document.getElementById("S3").value;
if ((c%10) == 0) {
alert ("The Social Insurance Number " + sin + " is valid");
}
else {
alert ("The Social Insurance Number " + sin + " is NOT valid");
return false;
}
}
</script>
</head>
<body>
Test numbers:- 046-454-286 193-456-787
<br><br>
Social Insurance Number <input type = "text" id = "S1" size =" 3" maxlength = "3" onkeyup = "validate(this,2)">
<input type = "text" id = "S2" size =" 3" maxlength = "3" onkeyup = "validate(this,3)">
<input type = "text" id = "S3" size =" 4" maxlength = "3" onkeyup = "validate(this,3)">
<br/><br/>
<input type="button" value="Validate Number" onclick="CheckNumber(sin)"/>
</body>
</html>
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