Change Text Box Color using Required Field Validator. No Extender Controls Please

Question

I need to change color of TextBox whenever its required field validator is fired on Clicking the Submit button

Answer 1

I liked Alexander's answer, but wanted the javascript to be more generic. So, here is a generic way of consuming the errors from a custom validator.

    function ValidateTextBox(source, args) {
        var cntrl_id = $(source).attr("controltovalidate");
        var cntrl = $("#" + cntrl_id);
        var is_valid = $(cntrl).val() != "";
        is_valid ? $(cntrl).removeClass("error") : $(cntrl).addClass("error");

        args.IsValid = is_valid;
    }