/*------------------------------------------------------------------------------------
 
	Preloader
	A very simple image preloader object
  
 	Usage:
 	
    Preloader.add(path);
    Preloader.onFinish(func);
    Preloader.load();
    
      path: 		A string or array of strings of image paths to preload
      func:     A function or array of functions to be called after images are loaded

      load():   Start the preloader
      
------------------------------------------------------------------------------------*/

var callbacks = [];
var images = [];
var loadedImages = [];
var imagesLoaded = 0;
  
function addimage(image)
	{
    if (typeof image == 'string') this.images.push(image);
    if (typeof image == 'array' || typeof image == 'object')
		{
      	for (var i=0; i< image.length; i++)
	  		{
        	this.images.push(image[i]);
      		}
    	}
  	}
	
function onFinish(func)
	{
    if (typeof func == 'function') this.callbacks.push(func);
    if (typeof func == 'array' || typeof func == 'object')
		{
      	for (var i=0; i< func.length; i++)
			{
        	this.callbacks.push(func[i]);
      		}
   		 }
  	}
	
	
function loadimages()
	{
    for(var i=0; i<this.images.length; i++)
		{
      	this.loadedImages[i] = new Image();
      	this.loadedImages[i].onload = function()
			{
			checkFinished.apply()
			}
     	this.loadedImages[i].src = this.images[i];
    	}
	}
  
function checkFinished()
	{
    this.imagesLoaded++;
    if (this.imagesLoaded < this.images.length)
		{
		document.getElementById('preloadcount').innerHTML = 'Loading image ' + imagesLoaded + ' of ' + (this.images.length - 1);
		}
    if (this.imagesLoaded == this.images.length)
		{
		this.fireFinish();
		}
	}
	
function fireFinish()
	{
    for (var i=0; i<this.callbacks.length; i++)
		{
		this.callbacks[i]();
		}
    this.images = [];
    this.loadedImages = [];
    this.imagesLoaded = 0;
    this.callbacks = [];
	}