client_side_validations gem radio buttons hack

    // client_side_validations rails gem doesn't handle radio buttons, so manually process those with this code
        // this code assumes that your related radio buttons are wrapped in a div with class .radio
        function validate_radio(validations, $radio) {
            var input_wrap = window.ClientSideValidations.forms.new_user.input_tag.split('<span id="input_tag" />');
            var label_wrap = window.ClientSideValidations.forms.new_user.label_tag.split('<label id="label_tag" />');

            if ($radio.find('input[type="radio"]:checked').length) {
                // buttons were checked, so if a previous error message was displayed then get rid of it.
                $radio.find('.field_with_errors > *').unwrap();
                $radio.find('.message').remove();
            } else {
                // no radio buttons in this group were checked so see if we have a presence validator
                var name = ($radio.find('input[type="radio"]').attr('name'));
                if (validations.validators[name] && validations.validators[name].presence.length) {
                    var message = '<label class="message">' + validations.validators[name].presence[0].message + '</label>';

                    // if we don't already have an error message, then display it
                    if (!$radio.find('field_with_errors').length) {
                        $radio.find('label').first().wrap(label_wrap[0]);
                        $radio.find('> label, > input').wrapAll(input_wrap[0]).parent().append(message);
                    }
                }
            }
        }

        $('form').each(function() {
            var validations = window.ClientSideValidations.forms[$(this).attr('id')];
            if (validations) {
                $(this).submit(function() {
                    // check all radio buttons on submit
                    $(this).find('.radio').each(function() {
                        validate_radio(validations, $(this));
                    });
                });
                $(this).find('.radio input[type="radio"]').blur(function() {
                    validate_radio(validations, $(this).parents('.radio'));
                });
            }
        });