or
var validatable = form.kendoValidator({ validateOnBlur: false}).data("kendoValidator");{ rules: { radio: function(input) { if (input.filter("[type=radio]") && input.attr("required")) { return $("form").find("[name=" + input.attr("name") + "]").is(":checked"); } return true; } }, messages: { radio: "Please select a status" } }