Best How To :

Seems to be some strange issue with hidden fields using the kendoNumericTextBox.

I was able to get it to work using the kendo validator: [See here]

There's also an interesting article [Here]

Updated Code:

$(document).ready(function () {


   $("#amount").kendoNumericTextBox();


    var validator = $("#testForm").kendoValidator().data("kendoValidator"), status = $(".status");
    $("form").submit(function(event) {
                    event.preventDefault();

                    if (validator.validate()) {
                        status.text("Valid")
                            .removeClass("invalid")
                            .addClass("valid");
                    } else {
                        status.text("Not Valid")
                            .removeClass("valid")
                            .addClass("invalid");
                    }
                });

});