SO - 21878668

by Arun P Johny

HTML

<form id="myform">
    <label for="field">Required, decimal number:</label>
    <input class="left" id="field" name="field">
    <br/>
    <input type="submit" value="Validate!">
</form>
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script src="http://jquery.bassistance.de/validate/jquery.validate.js"></script>
<script src="http://jquery.bassistance.de/validate/additional-methods.js"></script>
<script>

JavaScript

jQuery.validator.addMethod("mynumber", function (value, element) {
    return this.optional(element) || /^(\d+|\d+,\d{1,2})$/.test(value);
}, "Please specify the correct number format");

$("#myform").validate({
    //for debug only
    debug: true,
    rules: {
        field: {
            required: true,
            mynumber: true
        }
    }
});