(function($) {  
    var self = null;

    $.fn.liveUpdate = function(list) {    
        return this.each(function() {
            new $.liveUpdate(this, list);
        });
    };

    $.liveUpdate = function (e, list) {
        this.field = $(e);
        this.list  = $('#' + list);
        if (this.list.length > 0) {
            this.init();
        }
    };

    $.liveUpdate.prototype = {
        init: function() {
            var self = this;
            this.setupCache();
            this.field.parents('form').submit(function() { return false; });
            this.field.change(function() { self.filter(); });
            self.filter();
        },

        filter: function() {
            if ($.trim(this.field.val()) == 'all') { this.list.children('li').show(); return; }
            this.displayResults(this.getScores(this.field.val().toLowerCase()));
        },

        setupCache: function() {
            var self = this;
            this.cache = [];
            this.rows = [];
            this.list.children('li').each(function() {
                var _a = $(this).find('a').is('a') ? $(this).find('a') : false;
                self.cache.push(_a.attr("title"));
                self.rows.push($(this));
            });
            this.cache_length = this.cache.length;
        },

        displayResults: function(scores) {
            var self = this;
            this.list.children('li').hide();
            $.each(scores, function(i, score) { self.rows[score[1]].show(); });
        },

        getScores: function(term) {
            var scores = [];
            for (var i=0; i < this.cache_length; i++) {
                var score = this.cache[i].score(term);
                if (score > 0) { scores.push([score, i]); }
            }
            return scores.sort(function(a, b) { return b[0] - a[0]; });
        }
    }
})(jQuery);