SO - 14949257

by Arun P Johny

HTML

<script src="http://jquery.bassistance.de/validate/jquery.validate.js"></script>
<form>
    <input name="something" value="anc"/>
</form>

JavaScript

jQuery.validator.addMethod("specialChars", function( value, element ) {
        var regex = new RegExp("^[a-zA-Z0-9]+$");
        var key = value;

        if (!regex.test(key)) {
           return false;
        }
        return true;
    }, "please use only alphanumeric or alphabetic characters");

$('form').validate({
    rules: {
        something : {
            specialChars: true
        }
    }
});

console.log($('form').valid())