jQuery: Autohash extension

jquery.autohash.js

(function ($) {
    /**
     * jQuery extension to parse hash (#) in url,
     * fill in values of input boxes with the specific ID's,
     * and automatically update the values on address bar by
     * monitoring the change/keyup events.
     */
    $.fn.autohash = function () {
        
        // This extension is chainable
        return this.each(function () {
            
            // Gets the window hash and get rid of the # in front of it
            var hash = window.location.hash.substr(1, window.location.hash.length);
            // Simple things, breaking it down into array
            var array = hash.split("&");
            // Making sure the element currently modified is cached
            var element = $(this);

            // Keyup is the default event the extension fires on
            element.bind('keyup', function () {
                
                var hash2 = window.location.hash.substr(1, window.location.hash.length);
                var array2 = hash2.split("&");
                var result = Array();
                // Boolean to know whether the element is already found
                var set = false; 

                /**
                 * Simple loop to go through each element in tbe hash array,
                 * check if it's name matches the element's ID, if so
                 * its value in the array is changed and then joined later,
                 * unless the length is 0, in which case it can be removed from the hash
                 */
                $.each(array2, function(i, value) {
                    var split = value.split("=");

                    if (split[0] == element.attr('id')) {
                        split[1] = element.val();
                        set = true;
                    }
                    if (split[1] != undefined && split[1].length > 0) {
                        result[result.length] = split.join("=");
                    }
                });
                
                // If element can't be found, it'll be added here
                if (!set && element.val().length) {
                    result[result.length] = element.attr('id') + "=" + element.val();
                }

                // Finally the address bar text is changed, with an IE hack, as per usual.
                if (result.join("&").length > 2)
                    window.location.hash = result.join("&");
                else {
                    if ("pushState" in history)
                        history.pushState("", document.title, window.location.pathname);
                    else
                        window.location.hash = "";
                }
            });

            // Bind the change event to the previous function
            element.bind('change', function () {
                element.keyup();
            });
            
            // Upon loading, the values from hash tag are set
            // The change event is also triggered, if anything was listening to those
            $.each(array, function (i, value) {
                var split = value.split("=");
                
                if (split[0] == element.attr('id')) {
                    element.val(split[1]);
                    element.change();
                }
            });
        });
    };
})(jQuery);