Live update

liveupdate.js

// FROM http://orderedlist.com/blog/articles/live-search-with-quicksilver-style-for-jquery
(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.keyup(function() { self.filter(); });
                    self.filter();
            },
            
            filter: function() {
                    if ($.trim(this.field.val()) == '') { 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() {
                            self.cache.push(this.innerHTML.toLowerCase());
                            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);