Question

I have a textfield and the user enters the SSN number. While entering itself it should format. Like On the change of the textField… it should format 999-999-999 in this way on the display itself.

Answer 1

<input id="ssn"/>

<script type="text/javascript">
    $('#ssn').keyup(function() {
        var val = this.value.replace(/\D/g, '');
        val = val.replace(/^(\d{3})/, '$1-');
        val = val.replace(/-(\d{2})/, '-$1-');
        val = val.replace(/(\d)-(\d{4}).*/, '$1-$2');
        this.value = val;
    });
</script>