jQuery validate plugin : accept letters only?

Question

I\'m using the validate plugin from http://bassistance.de/jquery-plugins/jquery-plugin-validation/

What i\'m trying to find is a way to make some of my form fields a

Answer 1

Add cdn

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery-validate/1.15.0/additional-methods.js"></script>
rules:{
    txtname:{required: true,
            lettersonly:true
            }

Answer 2

Use below code in your script. this will add a new clause to your validator.

$.validator.addMethod(
        "alphabetsOnly",
        function(value, element, regexp) {
            var re = new RegExp(regexp);
            return this.optional(element) || re.test(value);
        },
        "Please check your input values again!!!."
);
$("#formElement").rules("add", {alphabetsOnly: "^[a-zA-Z'.\\s]$" })