Input normalization for the URN field

jquery.urn.js

/**
 * @author Kanstantsin A Kamkou (2ka.by)
 *
 * Example:
 *    $('#myField').urn();
 *    $('#myField').urn({on: 'keyup'});
 */
(function ($) {
    "use strict";

    // jQuery plugin
    $.fn.urn = function (options) {
        var skipList = [8, 16, 35, 36, 37, 38, 39, 40],
            options = $.extend({'on': 'blur'}, options);

        return this.on(options.on, function (event) {
            // some key-skips
            if ($.inArray(event.keyCode, skipList) !== -1) {
                return false;
            }

            var $self = $(this),
                value = $.trim($self.val());

            // lowercase convert
            value = value.toLowerCase();

            // spaces to -
            value = value.replace(/\s+/g, '-');

            // only alphanumeric
            value = value.replace(/[^\w\/-]/g, '');

            // trailing - and _ chars
            value = value.replace(/(-|_)+/g, '$01');

            // chars after the slash
            value = value.replace(/([._\/-]+)?\/+([._\/-]+)?/g, '/');

            // chars at the beginning and at the end
            value = value.replace(/^[._\/-]+|[._\/-]+$/g, '');

            // value update
            $self.val(value);

            return true;
        });
    };
}(jQuery));

This plugin is useful when you are working with a rewrite-field(an input field for the web-address of a publication). It'll clear the value of it.

Example: "ASdasdE #*$&342" to "asdasde-342"