var LiSwitcher = function() {}  
  
LiSwitcher.prototype = {  
    initialize: function(CONTROLS, VIEWPORT) {  
        this.CONTROLS = CONTROLS || "div#liSwitcher-controls";  
        this.PREVIOUS = $(this.CONTROLS).children("a#liSwitcher-previous");  
        this.NEXT = $(this.CONTROLS).children("a#liSwitcher-next");  
        this.VIEWPORT = VIEWPORT || "div#liSwitcher-viewport";  
        this.ITEMS = $(this.VIEWPORT).children("ul").children("li");  
        this.INTERVAL = 5000;  
        this.index = 0;  
        var Scope = this;  
        this.timer = setInterval(function() { Scope.nextImage(); }, this.INTERVAL);  
        this.jsActive(this.CONTROLS, this.ITEMS);  
        this.eventHandlers(this.PREVIOUS, this.NEXT);  
    },  
      
    jsActive: function(CONTROLS, ITEMS) {  
        $(CONTROLS).show();  
        $(ITEMS).not(":first").hide();  
    },  
      
    fadeIn: function(index) {  
        this.ITEMS.eq(index).fadeIn();  
    },  
      
    hide: function(index) {  
        this.ITEMS.eq(index).hide();  
    },      
      
    nextImage: function() {  
        this.hide(this.index);  
        this.index++;  
        if(this.index >= this.ITEMS.length) {  
            this.index = 0;  
        }  
        this.fadeIn(this.index);  
    },  
      
    previousImage: function() {  
        this.hide(this.index);  
        this.index--;  
        if(this.index <= -1) {  
            this.index = this.ITEMS.length - 1;  
        }  
        this.fadeIn(this.index);  
      
    },  
      
    eventHandlers: function(PREVIOUS, NEXT) {  
        var Scope = this;  
        $(PREVIOUS).bind("click",function() {  
            Scope.previousImage();  
            clearInterval(Scope.timer);  
            return false;  
        });  
        $(NEXT).bind("click",function() {  
            Scope.nextImage();  
            clearInterval(Scope.timer);  
            return false;  
        });  
    }  
  
};  
  
  
var liSwitcher = new LiSwitcher();  
$(function() {  
    liSwitcher.initialize();  
});