How can I add, remove, or swap jQuery validation rules from a page?

Question

Note:
This question refers to a very old version of jQuery.validate() (version 1.5). This plugin now provides a built-in solution for doing this: the .r

Answer 1

I wrote small function for editting rules (only required).

        $.editRules = function($array, $type) {
            var settings = $('#signupForm').validate().settings;
            $.each($array, function($k, $v) {
                settings.rules[$v] = {required: ($type == 'add' ? true : false)};
            });
        };