JavaScript Program to Check AADHAAR Card Format Using Regular Expression

JavaScript Program to Check AADHAAR Card Format Using Regular Expression

Write a JavaScript program to check aadhaar card format using regular expression.



Source Code
<html>
<head>
    <title>Regular expression - Aadhar card format check</title>
    <script>
        function check()
        {
            var aadhar_no = myform.aadhar_no.value;
            re = /^\d{4}\s\d{4}\s\d{4}$/
            if(re.test(aadhar_no))
            {
                alert('Valid format');
            }
            else
            {
                alert('Invalid format');
            }
        }
    </script>
</head>
<body>
<form name="myform">
    Enter AADHAR no. <input type="text" id="aadhar_no"/><br>
    <input type="button" value="Submit" onclick="check()"/>
</form>
</body>
</html>
Output