var onload_funcs = []; // Store function names, to be called once the page finishes loading


function accordions_setup(acc)
{
	// If the hash URL exists in the accordion
	if (acc.hasItem(window.location.hash.substring(1)))
	{
		for (var i in acc.items)
		{
			if (window.location.hash != '#'+i)
			{
				accordion_set_display(i);
			}
		}
	}
	else
	{
		for (var i in acc.items)
		{
			if (acc.items[i] != 1)
			{
				accordion_set_display(i);
			}
		}
	}
}

function accordion_set_display(i)
{
	var header = document.getElementById(i);
	
	header.className = 'accordion_header accordion_closed';
	
	var content = header.nextSibling;
	
	while (content.nodeType != 1) 
	{
		content = content.nextSibling;
	}
	content.style.display='none';
}



/*
 *	Hash 
 * Implements better associative arrays
 */
function Hash()
{
	this.length = 0;
	this.items = new Array();
	for (var i = 0; i < arguments.length; i += 2) {
		if (typeof(arguments[i + 1]) != 'undefined') {
			this.items[arguments[i]] = arguments[i + 1];
			this.length++;
		}
	}
   
	this.removeItem = function(in_key)
	{
		var tmp_previous;
		if (typeof(this.items[in_key]) != 'undefined') {
			this.length--;
			var tmp_previous = this.items[in_key];
			delete this.items[in_key];
		}
	   
		return tmp_previous;
	}

	this.getItem = function(in_key) {
		return this.items[in_key];
	}

	this.setItem = function(in_key, in_value)
	{
		var tmp_previous;
		if (typeof(in_value) != 'undefined') {
			if (typeof(this.items[in_key]) == 'undefined') {
				this.length++;
			}
			else {
				tmp_previous = this.items[in_key];
			}

			this.items[in_key] = in_value;
		}
	   
		return tmp_previous;
	}

	this.hasItem = function(in_key)
	{
		return typeof(this.items[in_key]) != 'undefined';
	}

	this.clear = function()
	{
		for (var i in this.items) {
			delete this.items[i];
		}

		this.length = 0;
	}
}

/*
 * preloadImages 
 * Pre laoding of images
 */preloadImages = 
{
  count: 0 /* keep track of the number of images */
  ,loaded: 0 /* keeps track of how many images have loaded */
  ,onComplete: function(){} /* fires when all images have finished loadng */
  ,onLoaded: function(){} /*fires when an image finishes loading*/
  ,loaded_image: "" /*access what has just been loaded*/
  ,images: [] /*keeps an array of images that are loaded*/
  ,incoming:[] /*this is for the process queue.*/
  /* this will pass the list of images to the loader*/
  ,queue_images: function(images)
  {
    //make sure to reset the counters
    this.loaded = 0;
    
    //reset the images array also
    this.images = [];
    
    //record the number of images
    this.count = images.length;
    
    //store the image names
    this.incoming = images;
    
    //start processing the images one by one
    this.process_queue();
  }
  ,process_queue: function()
  {
    //pull the next image off the top and load it
    this.load_image(this.incoming.shift());
  }
  /* this will load the images through the browser */
  ,load_image: function(image)
  {
    var this_ref = this;
    var preload_image = new Image;
    
    preload_image.onload = function()
    {
      //store the loaded image so we can access the new info
      this_ref.loaded_image = preload_image;
      
      //push images onto the stack
      this_ref.images.push(preload_image);
      
      //note that the image loaded
      this_ref.loaded +=1;
      
      //fire the onloaded
      (this_ref.onLoaded)();
      
      //if all images have been loaded launch the call back
      if(this_ref.count == this_ref.loaded)
      {
        (this_ref.onComplete)(); 
      }
      //load the next image
      else
      {
        this_ref.process_queue();
      }
    }
    preload_image.src = image;
  }
}